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Cannot access Windows Installer

Discussion in 'Windows XP' started by ChrisV99, Jan 29, 2010.

  1. ChrisV99

    ChrisV99 Flightless Bird

    My Windows Installer has stopped functioning - cannot install or uninstall
    programs - I get a dialogue box message: "The Windows Installer Service could
    not be accessed. This can occur if you are running Windows in Safe mode, or
    if the Windows Installer is not correctly installed. Contact your support
    personnel for assistance".

    I have Windows XP Home Edition Version 2002, Service Pack 3. It's been
    operating OK for years, now this.

    I've had an Office validation issue, but it's now sorted.

    Also, on boot up I get a Windows Recovery message: "One of the files
    containing the system's Registry data had to be recovered by use of a log or
    alternate copy. The recovery was successful."

    Not sure if there's a connection. Any ideas?
     
  2. Elmo

    Elmo Flightless Bird

    ChrisV99 wrote:
    > My Windows Installer has stopped functioning - cannot install or uninstall
    > programs - I get a dialogue box message: "The Windows Installer Servicecould
    > not be accessed. This can occur if you are running Windows in Safe mode, or
    > if the Windows Installer is not correctly installed. Contact your support
    > personnel for assistance".
    >
    > I have Windows XP Home Edition Version 2002, Service Pack 3. It's been
    > operating OK for years, now this.
    >
    > I've had an Office validation issue, but it's now sorted.
    >
    > Also, on boot up I get a Windows Recovery message: "One of the files
    > containing the system's Registry data had to be recovered by use of a log or
    > alternate copy. The recovery was successful."
    >
    > Not sure if there's a connection. Any ideas?


    A few ideas:

    - Use System Restore to go back to a restore point dated before this
    issue surfaced. That could mess with your Office validation, I suppose.

    - Run Chkdsk.

    - Run this:

    Malwarebytes© Corporation
    http://www.malwarebytes.org/mbam/program/mbam-setup.exe

    --
    Joe =o)
     
  3. PA Bear [MS MVP]

    PA Bear [MS MVP] Flightless Bird

    What anti-virus application or security suite is installed and is your
    subscription current? What anti-spyware applications (other than Defender)?
    What third-party firewall (if any)?

    Has a(another) Norton or McAfee application ever been installed on the
    computer (e.g., a free-trial version that came preinstalled when you bought
    it)?

    ChrisV99 wrote:
    > My Windows Installer has stopped functioning - cannot install or uninstall
    > programs - I get a dialogue box message: "The Windows Installer Service
    > could not be accessed. This can occur if you are running Windows in Safe
    > mode, or if the Windows Installer is not correctly installed. Contact your
    > support personnel for assistance".
    >
    > I have Windows XP Home Edition Version 2002, Service Pack 3. It's been
    > operating OK for years, now this.
    >
    > I've had an Office validation issue, but it's now sorted.
    >
    > Also, on boot up I get a Windows Recovery message: "One of the files
    > containing the system's Registry data had to be recovered by use of a log
    > or
    > alternate copy. The recovery was successful."
    >
    > Not sure if there's a connection. Any ideas?
     
  4. Bruce Chambers

    Bruce Chambers Flightless Bird

    ChrisV99 wrote:
    > My Windows Installer has stopped functioning - cannot install or uninstall
    > programs - I get a dialogue box message: "The Windows Installer Service could
    > not be accessed. This can occur if you are running Windows in Safe mode, or
    > if the Windows Installer is not correctly installed. Contact your support
    > personnel for assistance".
    >
    > I have Windows XP Home Edition Version 2002, Service Pack 3. It's been
    > operating OK for years, now this.
    >
    > I've had an Office validation issue, but it's now sorted.
    >
    > Also, on boot up I get a Windows Recovery message: "One of the files
    > containing the system's Registry data had to be recovered by use of a log or
    > alternate copy. The recovery was successful."
    >
    > Not sure if there's a connection. Any ideas?



    Have you tried repairing or re-installing the Microsoft Installer Service?

    http://www.microsoft.com/downloads/...FamilyID=5a58b56f-60b6-4412-95b9-54d056d6f9f4


    --

    Bruce Chambers

    Help us help you:
    http://www.catb.org/~esr/faqs/smart-questions.html

    http://support.microsoft.com/default.aspx/kb/555375

    They that can give up essential liberty to obtain a little temporary
    safety deserve neither liberty nor safety. ~Benjamin Franklin

    Many people would rather die than think; in fact, most do. ~Bertrand Russell

    The philosopher has never killed any priests, whereas the priest has
    killed a great many philosophers.
    ~ Denis Diderot
     
  5. someone watching

    someone watching Flightless Bird

    use this command in your RUN box:

    msiexec /regserver

    Should solve the problem!
     
  6. ChrisV99

    ChrisV99 Flightless Bird

    "PA Bear [MS MVP]" wrote:

    > What anti-virus application or security suite is installed and is your
    > subscription current? What anti-spyware applications (other than Defender)?
    > What third-party firewall (if any)?
    >
    > Has a(another) Norton or McAfee application ever been installed on the
    > computer (e.g., a free-trial version that came preinstalled when you bought
    > it)?
    >
    > ChrisV99 wrote:
    > > My Windows Installer has stopped functioning - cannot install or uninstall
    > > programs - I get a dialogue box message: "The Windows Installer Service
    > > could not be accessed. This can occur if you are running Windows in Safe
    > > mode, or if the Windows Installer is not correctly installed. Contact your
    > > support personnel for assistance".
    > >
    > > I have Windows XP Home Edition Version 2002, Service Pack 3. It's been
    > > operating OK for years, now this.
    > >
    > > I've had an Office validation issue, but it's now sorted.
    > >
    > > Also, on boot up I get a Windows Recovery message: "One of the files
    > > containing the system's Registry data had to be recovered by use of a log
    > > or
    > > alternate copy. The recovery was successful."
    > >
    > > Not sure if there's a connection. Any ideas?

    >
    > .
    > I have AVG Free Edition Version 8.5.432 anti-virus, Zone Alarm version 8.0.298.000 firewall, also AdAware (which I can't update that due to the installer problem). Don't think we've ever had Norton on this machine, but may have had McAfee at some point.


    Have downloaded Windows Installer 4.5 as Bruce suggested, and the setup
    wizard ran OK, but it makes no difference - still can't access Windows
    Installer Service.

    Tried RUN msiexec /regserver as someone watching suggested, but still no go.
     
  7. PA Bear [MS MVP]

    PA Bear [MS MVP] Flightless Bird

    ChrisV99 wrote:
    >>> My Windows Installer has stopped functioning - cannot install or
    >>> uninstall
    >>> programs - I get a dialogue box message: "The Windows Installer Service
    >>> could not be accessed. This can occur if you are running Windows in Safe
    >>> mode, or if the Windows Installer is not correctly installed. Contact
    >>> your
    >>> support personnel for assistance".
    >>>
    >>> I have Windows XP Home Edition Version 2002, Service Pack 3. It's been
    >>> operating OK for years, now this.
    >>>
    >>> I've had an Office validation issue, but it's now sorted.
    >>>
    >>> Also, on boot up I get a Windows Recovery message: "One of the files
    >>> containing the system's Registry data had to be recovered by use of a
    >>> log
    >>> or
    >>> alternate copy. The recovery was successful."
    >>>
    >>> Not sure if there's a connection. Any ideas?

    >>
    >> What anti-virus application or security suite is installed and is your
    >> subscription current? What anti-spyware applications (other than
    >> Defender)? What third-party firewall (if any)?
    >>
    >> Has a(another) Norton or McAfee application ever been installed on the
    >> computer (e.g., a free-trial version that came preinstalled when you
    >> bought
    >> it)?
    >>

    > I have AVG Free Edition Version 8.5.432 anti-virus, Zone Alarm version
    > 8.0.298.000 firewall, also AdAware (which I can't update that due to the
    > installer problem). Don't think we've ever had Norton on this machine, but
    > may have had McAfee at some point.
    >
    > Have downloaded Windows Installer 4.5 as Bruce suggested, and the setup
    > wizard ran OK, but it makes no difference - still can't access Windows
    > Installer Service.
    >
    > Tried RUN msiexec /regserver as someone watching suggested, but still no
    > go.


    OK, we'll bottom-post.

    Give this a whirl:

    1. Download the McAfee Consumer Products Removal Tool, saving it to your
    desktop:
    http://download.mcafee.com/products/licensed/cust_support_patches/MCPR.exe

    2. Close all open applications (i.e., anything with an icon on the taskbar).

    3. Double-click on the file you saved in #1 above to run the utility. Don't
    TOUCH your keyboard until the run completes, then reboot & test.

    If still no joy, you may be seeing the effects of a hijackware infection.
     
  8. ChrisV99

    ChrisV99 Flightless Bird

    "PA Bear [MS MVP]" wrote:

    > ChrisV99 wrote:
    > >>> My Windows Installer has stopped functioning - cannot install or
    > >>> uninstall
    > >>> programs - I get a dialogue box message: "The Windows Installer Service
    > >>> could not be accessed. This can occur if you are running Windows in Safe
    > >>> mode, or if the Windows Installer is not correctly installed. Contact
    > >>> your
    > >>> support personnel for assistance".
    > >>>
    > >>> I have Windows XP Home Edition Version 2002, Service Pack 3. It's been
    > >>> operating OK for years, now this.
    > >>>
    > >>> I've had an Office validation issue, but it's now sorted.
    > >>>
    > >>> Also, on boot up I get a Windows Recovery message: "One of the files
    > >>> containing the system's Registry data had to be recovered by use of a
    > >>> log
    > >>> or
    > >>> alternate copy. The recovery was successful."
    > >>>
    > >>> Not sure if there's a connection. Any ideas?
    > >>
    > >> What anti-virus application or security suite is installed and is your
    > >> subscription current? What anti-spyware applications (other than
    > >> Defender)? What third-party firewall (if any)?
    > >>
    > >> Has a(another) Norton or McAfee application ever been installed on the
    > >> computer (e.g., a free-trial version that came preinstalled when you
    > >> bought
    > >> it)?
    > >>

    > > I have AVG Free Edition Version 8.5.432 anti-virus, Zone Alarm version
    > > 8.0.298.000 firewall, also AdAware (which I can't update that due to the
    > > installer problem). Don't think we've ever had Norton on this machine, but
    > > may have had McAfee at some point.
    > >
    > > Have downloaded Windows Installer 4.5 as Bruce suggested, and the setup
    > > wizard ran OK, but it makes no difference - still can't access Windows
    > > Installer Service.
    > >
    > > Tried RUN msiexec /regserver as someone watching suggested, but still no
    > > go.

    >
    > OK, we'll bottom-post.
    >
    > Give this a whirl:
    >
    > 1. Download the McAfee Consumer Products Removal Tool, saving it to your
    > desktop:
    > http://download.mcafee.com/products/licensed/cust_support_patches/MCPR.exe
    >
    > 2. Close all open applications (i.e., anything with an icon on the taskbar).
    >
    > 3. Double-click on the file you saved in #1 above to run the utility. Don't
    > TOUCH your keyboard until the run completes, then reboot & test.
    >
    > If still no joy, you may be seeing the effects of a hijackware infection.
    >
    > .
    > Ran the McAfee cleaner, still no joy.
     
  9. ChrisV99

    ChrisV99 Flightless Bird

    "Elmo" wrote:

    > ChrisV99 wrote:
    > > My Windows Installer has stopped functioning - cannot install or uninstall
    > > programs - I get a dialogue box message: "The Windows Installer Service could
    > > not be accessed. This can occur if you are running Windows in Safe mode, or
    > > if the Windows Installer is not correctly installed. Contact your support
    > > personnel for assistance".
    > >
    > > I have Windows XP Home Edition Version 2002, Service Pack 3. It's been
    > > operating OK for years, now this.
    > >
    > > I've had an Office validation issue, but it's now sorted.
    > >
    > > Also, on boot up I get a Windows Recovery message: "One of the files
    > > containing the system's Registry data had to be recovered by use of a log or
    > > alternate copy. The recovery was successful."
    > >
    > > Not sure if there's a connection. Any ideas?

    >
    > A few ideas:
    >
    > - Use System Restore to go back to a restore point dated before this
    > issue surfaced. That could mess with your Office validation, I suppose.
    >
    > - Run Chkdsk.
    >
    > - Run this:
    >
    > Malwarebytes© Corporation
    > http://www.malwarebytes.org/mbam/program/mbam-setup.exe
    >
    > --
    > Joe =o)
    > .

    Elmo, I ran chkdsk, also downloaded Malwarebytes and ran full scan, but only
    came up with a bit of adware - still no go with Installer.
    >
     
  10. Elmo

    Elmo Flightless Bird

    ChrisV99 wrote:
    >
    > "Elmo" wrote:
    >
    >> ChrisV99 wrote:
    >>> My Windows Installer has stopped functioning - cannot install or uninstall
    >>> programs - I get a dialogue box message: "The Windows Installer Service could
    >>> not be accessed. This can occur if you are running Windows in Safe mode, or
    >>> if the Windows Installer is not correctly installed. Contact your support
    >>> personnel for assistance".
    >>>
    >>> I have Windows XP Home Edition Version 2002, Service Pack 3. It's been
    >>> operating OK for years, now this.
    >>>
    >>> I've had an Office validation issue, but it's now sorted.
    >>>
    >>> Also, on boot up I get a Windows Recovery message: "One of the files
    >>> containing the system's Registry data had to be recovered by use of alog or
    >>> alternate copy. The recovery was successful."
    >>>
    >>> Not sure if there's a connection. Any ideas?

    >> A few ideas:
    >>
    >> - Use System Restore to go back to a restore point dated before this
    >> issue surfaced. That could mess with your Office validation, I suppose.
    >>
    >> - Run Chkdsk.
    >>
    >> - Run this:
    >>
    >> Malwarebytes© Corporation
    >> http://www.malwarebytes.org/mbam/program/mbam-setup.exe
    >>
    >> --
    >> Joe =o)

    >
    > Elmo, I ran chkdsk, also downloaded Malwarebytes and ran full scan, butonly
    > came up with a bit of adware - still no go with Installer.


    Here's what I would try next, from a Google search. It's similar to
    what's been suggested, but includes more steps.

    http://support.microsoft.com/kb/315346

    --
    Joe =o)
     
  11. ChrisV99

    ChrisV99 Flightless Bird

    "Elmo" wrote:

    > ChrisV99 wrote:
    > >
    > > "Elmo" wrote:
    > >
    > >> ChrisV99 wrote:
    > >>> My Windows Installer has stopped functioning - cannot install or uninstall
    > >>> programs - I get a dialogue box message: "The Windows Installer Service could
    > >>> not be accessed. This can occur if you are running Windows in Safe mode, or
    > >>> if the Windows Installer is not correctly installed. Contact your support
    > >>> personnel for assistance".
    > >>>
    > >>> I have Windows XP Home Edition Version 2002, Service Pack 3. It's been
    > >>> operating OK for years, now this.
    > >>>
    > >>> I've had an Office validation issue, but it's now sorted.
    > >>>
    > >>> Also, on boot up I get a Windows Recovery message: "One of the files
    > >>> containing the system's Registry data had to be recovered by use of a log or
    > >>> alternate copy. The recovery was successful."
    > >>>
    > >>> Not sure if there's a connection. Any ideas?
    > >> A few ideas:
    > >>
    > >> - Use System Restore to go back to a restore point dated before this
    > >> issue surfaced. That could mess with your Office validation, I suppose.
    > >>
    > >> - Run Chkdsk.
    > >>
    > >> - Run this:
    > >>
    > >> Malwarebytes© Corporation
    > >> http://www.malwarebytes.org/mbam/program/mbam-setup.exe
    > >>
    > >> --
    > >> Joe =o)

    > >
    > > Elmo, I ran chkdsk, also downloaded Malwarebytes and ran full scan, but only
    > > came up with a bit of adware - still no go with Installer.

    >
    > Here's what I would try next, from a Google search. It's similar to
    > what's been suggested, but includes more steps.
    >
    > http://support.microsoft.com/kb/315346
    >
    > --
    > Joe =o)
    > .
    > Thanks for the suggestion, but still no go. I tried all the methods - reregistering Windows Installer, reinstalling Windows Installer (I downloaded Windows Installer 4.5 for SP3) and restoring registry. In fact the System Restore failed, with message "Your computer cannot be restored to [date] system checkpoint".


    I'm still getting the message on startup "One of the files containing the
    system's Registry data had to be recovered by use of a log or alternate
    copy".

    I think maybe I need to reinstall Windows XP from scratch.
     
  12. Elmo

    Elmo Flightless Bird

    ChrisV99 wrote:
    >
    > "Elmo" wrote:
    >
    >> ChrisV99 wrote:
    >>> "Elmo" wrote:
    >>>
    >>>> ChrisV99 wrote:
    >>>>> My Windows Installer has stopped functioning - cannot install or uninstall
    >>>>> programs - I get a dialogue box message: "The Windows Installer Service could
    >>>>> not be accessed. This can occur if you are running Windows in Safe mode, or
    >>>>> if the Windows Installer is not correctly installed. Contact your support
    >>>>> personnel for assistance".
    >>>>>
    >>>>> I have Windows XP Home Edition Version 2002, Service Pack 3. It's been
    >>>>> operating OK for years, now this.
    >>>>>
    >>>>> I've had an Office validation issue, but it's now sorted.
    >>>>>
    >>>>> Also, on boot up I get a Windows Recovery message: "One of the files
    >>>>> containing the system's Registry data had to be recovered by use ofa log or
    >>>>> alternate copy. The recovery was successful."
    >>>>>
    >>>>> Not sure if there's a connection. Any ideas?
    >>>> A few ideas:
    >>>>
    >>>> - Use System Restore to go back to a restore point dated before this
    >>>> issue surfaced. That could mess with your Office validation, I suppose.
    >>>>
    >>>> - Run Chkdsk.
    >>>>
    >>>> - Run this:
    >>>>
    >>>> Malwarebytes© Corporation
    >>>> http://www.malwarebytes.org/mbam/program/mbam-setup.exe
    >>>>
    >>>> --
    >>>> Joe =o)
    >>> Elmo, I ran chkdsk, also downloaded Malwarebytes and ran full scan, but only
    >>> came up with a bit of adware - still no go with Installer.

    >> Here's what I would try next, from a Google search. It's similar to
    >> what's been suggested, but includes more steps.
    >>
    >> http://support.microsoft.com/kb/315346
    >>
    >> --
    >> Joe =o)
    >> .
    >> Thanks for the suggestion, but still no go. I tried all the methods - reregistering Windows Installer, reinstalling Windows Installer (I downloaded Windows Installer 4.5 for SP3) and restoring registry. In fact the System Restore failed, with message "Your computer cannot be restored to [date] system checkpoint".

    >
    > I'm still getting the message on startup "One of the files containing the
    > system's Registry data had to be recovered by use of a log or alternate
    > copy".
    >
    > I think maybe I need to reinstall Windows XP from scratch.


    A Google search netted this possible solution:

    I found a solution to the problem. The problem was being caused by some
    corrupted files on the hard drive. So what I had to do was go to my
    computer and right click on the hard drive (which is generally C: unless
    you have specified otherwise) then click Properties. This will bring up
    the hard drive Properties window. Now click on the Tools tab and then
    click on Check Now... then you will need to select both the
    "Automatically fix file system errors" and the "check for and attempt
    recovery of bad sectors" and then click ok it will then prompt you to
    schedule a scan at startup click yes and then manually restart your
    computer. When you computer restarts it will scan the hard drive and
    repair any errors. This process takes about 1 to 3 hours depending on
    the size and condition of your hard drive. Once this is finished your
    computer will restart and the problem should be resolved.

    --
    Joe =o)
     
  13. ChrisV99

    ChrisV99 Flightless Bird

    "Elmo" wrote:

    > ChrisV99 wrote:
    > >
    > > "Elmo" wrote:
    > >
    > >> ChrisV99 wrote:
    > >>> "Elmo" wrote:
    > >>>
    > >>>> ChrisV99 wrote:
    > >>>>> My Windows Installer has stopped functioning - cannot install or uninstall
    > >>>>> programs - I get a dialogue box message: "The Windows Installer Service could
    > >>>>> not be accessed. This can occur if you are running Windows in Safe mode, or
    > >>>>> if the Windows Installer is not correctly installed. Contact your support
    > >>>>> personnel for assistance".
    > >>>>>
    > >>>>> I have Windows XP Home Edition Version 2002, Service Pack 3. It's been
    > >>>>> operating OK for years, now this.
    > >>>>>
    > >>>>> I've had an Office validation issue, but it's now sorted.
    > >>>>>
    > >>>>> Also, on boot up I get a Windows Recovery message: "One of the files
    > >>>>> containing the system's Registry data had to be recovered by use of a log or
    > >>>>> alternate copy. The recovery was successful."
    > >>>>>
    > >>>>> Not sure if there's a connection. Any ideas?
    > >>>> A few ideas:
    > >>>>
    > >>>> - Use System Restore to go back to a restore point dated before this
    > >>>> issue surfaced. That could mess with your Office validation, I suppose.
    > >>>>
    > >>>> - Run Chkdsk.
    > >>>>
    > >>>> - Run this:
    > >>>>
    > >>>> Malwarebytes© Corporation
    > >>>> http://www.malwarebytes.org/mbam/program/mbam-setup.exe
    > >>>>
    > >>>> --
    > >>>> Joe =o)
    > >>> Elmo, I ran chkdsk, also downloaded Malwarebytes and ran full scan, but only
    > >>> came up with a bit of adware - still no go with Installer.
    > >> Here's what I would try next, from a Google search. It's similar to
    > >> what's been suggested, but includes more steps.
    > >>
    > >> http://support.microsoft.com/kb/315346
    > >>
    > >> --
    > >> Joe =o)
    > >> .
    > >> Thanks for the suggestion, but still no go. I tried all the methods - reregistering Windows Installer, reinstalling Windows Installer (I downloaded Windows Installer 4.5 for SP3) and restoring registry. In fact the System Restore failed, with message "Your computer cannot be restored to [date] system checkpoint".

    > >
    > > I'm still getting the message on startup "One of the files containing the
    > > system's Registry data had to be recovered by use of a log or alternate
    > > copy".
    > >
    > > I think maybe I need to reinstall Windows XP from scratch.

    >
    > A Google search netted this possible solution:
    >
    > I found a solution to the problem. The problem was being caused by some
    > corrupted files on the hard drive. So what I had to do was go to my
    > computer and right click on the hard drive (which is generally C: unless
    > you have specified otherwise) then click Properties. This will bring up
    > the hard drive Properties window. Now click on the Tools tab and then
    > click on Check Now... then you will need to select both the
    > "Automatically fix file system errors" and the "check for and attempt
    > recovery of bad sectors" and then click ok it will then prompt you to
    > schedule a scan at startup click yes and then manually restart your
    > computer. When you computer restarts it will scan the hard drive and
    > repair any errors. This process takes about 1 to 3 hours depending on
    > the size and condition of your hard drive. Once this is finished your
    > computer will restart and the problem should be resolved.
    >
    > --
    > Joe =o)
    > .
    > Thanks Joe, but no luck - ran this, but still getting same problems. I'll back up what I can and reinstall Windows. The ironic thing is I won't be able to use the Windows XP backup because in XP Home Edition this has to be installed from the CD, and guess what...the Windows Installer doesn't work!


    Oh well. I'll post to let people know how it goes.
     
  14. ChrisV99

    ChrisV99 Flightless Bird

    "ChrisV99" wrote:

    >
    >
    > "Elmo" wrote:
    >
    > > ChrisV99 wrote:
    > > >
    > > > "Elmo" wrote:
    > > >
    > > >> ChrisV99 wrote:
    > > >>> "Elmo" wrote:
    > > >>>
    > > >>>> ChrisV99 wrote:
    > > >>>>> My Windows Installer has stopped functioning - cannot install or uninstall
    > > >>>>> programs - I get a dialogue box message: "The Windows Installer Service could
    > > >>>>> not be accessed. This can occur if you are running Windows in Safe mode, or
    > > >>>>> if the Windows Installer is not correctly installed. Contact your support
    > > >>>>> personnel for assistance".
    > > >>>>>
    > > >>>>> I have Windows XP Home Edition Version 2002, Service Pack 3. It's been
    > > >>>>> operating OK for years, now this.
    > > >>>>>
    > > >>>>> I've had an Office validation issue, but it's now sorted.
    > > >>>>>
    > > >>>>> Also, on boot up I get a Windows Recovery message: "One of the files
    > > >>>>> containing the system's Registry data had to be recovered by use of a log or
    > > >>>>> alternate copy. The recovery was successful."
    > > >>>>>
    > > >>>>> Not sure if there's a connection. Any ideas?
    > > >>>> A few ideas:
    > > >>>>
    > > >>>> - Use System Restore to go back to a restore point dated before this
    > > >>>> issue surfaced. That could mess with your Office validation, I suppose.
    > > >>>>
    > > >>>> - Run Chkdsk.
    > > >>>>
    > > >>>> - Run this:
    > > >>>>
    > > >>>> Malwarebytes© Corporation
    > > >>>> http://www.malwarebytes.org/mbam/program/mbam-setup.exe
    > > >>>>
    > > >>>> --
    > > >>>> Joe =o)
    > > >>> Elmo, I ran chkdsk, also downloaded Malwarebytes and ran full scan, but only
    > > >>> came up with a bit of adware - still no go with Installer.
    > > >> Here's what I would try next, from a Google search. It's similar to
    > > >> what's been suggested, but includes more steps.
    > > >>
    > > >> http://support.microsoft.com/kb/315346
    > > >>
    > > >> --
    > > >> Joe =o)
    > > >> .
    > > >> Thanks for the suggestion, but still no go. I tried all the methods - reregistering Windows Installer, reinstalling Windows Installer (I downloaded Windows Installer 4.5 for SP3) and restoring registry. In fact the System Restore failed, with message "Your computer cannot be restored to [date] system checkpoint".
    > > >
    > > > I'm still getting the message on startup "One of the files containing the
    > > > system's Registry data had to be recovered by use of a log or alternate
    > > > copy".
    > > >
    > > > I think maybe I need to reinstall Windows XP from scratch.

    > >
    > > A Google search netted this possible solution:
    > >
    > > I found a solution to the problem. The problem was being caused by some
    > > corrupted files on the hard drive. So what I had to do was go to my
    > > computer and right click on the hard drive (which is generally C: unless
    > > you have specified otherwise) then click Properties. This will bring up
    > > the hard drive Properties window. Now click on the Tools tab and then
    > > click on Check Now... then you will need to select both the
    > > "Automatically fix file system errors" and the "check for and attempt
    > > recovery of bad sectors" and then click ok it will then prompt you to
    > > schedule a scan at startup click yes and then manually restart your
    > > computer. When you computer restarts it will scan the hard drive and
    > > repair any errors. This process takes about 1 to 3 hours depending on
    > > the size and condition of your hard drive. Once this is finished your
    > > computer will restart and the problem should be resolved.
    > >
    > > --
    > > Joe =o)
    > > .
    > > Thanks Joe, but no luck - ran this, but still getting same problems. I'll back up what I can and reinstall Windows. The ironic thing is I won't be able to use the Windows XP backup because in XP Home Edition this has to be installed from the CD, and guess what...the Windows Installer doesn't work!

    >
    > Oh well. I'll post to let people know how it goes.


    Problem fixed - have reinstalled Windows XP, and can now use Installer and
    don't get the recovery message on boot up. I've spent a couple of days
    reinstalling and retrieving stuff, scanning etc, but worth it.

    Thanks to all for your suggestions.
     

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