My friend's WinXp computer, SP3, 2 GB RAM, Norton AV is in a state where neither Firefox nor IE7 will open. However, Google Chrome works fine to get to the internet. This all started while updating Firefox from Ver 3.5.8 to Ver 3.6. At the restart now or later prompt-I chose later. That was it! After that I couldn't open either Firefox or IE not matter what I tried. So far I've uninstalled Firefox using Add/Remove then did a System Restore in Safe mode (which restored correctly) as well as in Normal mode (which would not do the restore). After the Safe Mode Restore I was (momentarily) able to open IE and download Firefox Ver 3.6. I seemed to install just fine but clicking the desktop icon did nothing. I tried disabling all of Norton's apps (AV, antispyware, etc..,) and then re-installing Firefox to no avail. I tried going the the actual Firefox Ver 3.6 application file in My Programs and creating a new shortcut from the App file. None of that worked. Overall system response time seems just fine so I don't suspect Malware or Spyware but I'm not sure. Haven't had a chance to install and run MBAM or SAS yet but I will. I'm out of ideas. I tried something I've done before many times and all it did was disable IE and Firefox. Every time I do a restart I get a message that Firefox is trying to shut down, leading me to believe it's running in the background or was in the process of trying to open up. It appears to be trying to shut it down but ends up failing so I have to force it off with an `End Task'. Task Manager shows nothing running. I can try uninstalling Firefox 3.6 using REVO uninstaller and then try to re-install a fresh copy of Firefox Ver 3.6. I could also install CCleaner (I have it on a flash drive) and seeing if cleaning up Temp Internet files works. Does anyone think Norton could be hosing something up? I hate that *&^%((((##@@ program but I'm loath to uninstall Norton since the machine owner bought his copy online and downloaded it so we may never be able to get it re-installed. Another possible factor: This machine has 2 user profiles, with Firefox installed in both. Maybe the issues with Firefox in one profile is screwing up the firefox application in the other profile. But I'd be the first one to admit that I know exactly squat about User profiles and how they work. Anyone have any ideas how to get these 2 browsers working again? If I don't come up with any solutions I may have to call Mozilla and get some phone support. Thanks in advance......Paul C.