I have Windows XP Home SP2. I did a Windows Update and it wanted me to install Framework 3.5 SP1 before doing any other updates. On the first Restart after installation, it said there was a problem with my logon profile (possibly corrupt), and it logged me on with a temporary profile. The desktop was completely different from my usual desktop. I restarted again and didn't have a problem with my profile. I saw my usual desktop. However, every time right after logging in, I also saw a Windows Installer dialog saying that the feature I was trying to install was not available and to insert the "Update Manager" disk and click OK. I clicked Cancel several times before the dialog would go away. I tried various things to eliminate the dialog, but nothing worked. Sometimes if I stayed in the Windows session for more than a few minutes, it would come back, and again I'd have to click Cancel multiple times to eliminate it. I then tried "repairing" 3.5 SP1, which supposedly put it back to its "original state," whatever that was. That didn't help. I then removed 3.5 entirely. I didn't realize, though, that MS had also installed 3.0 as part of going to 3.5 (apparently I had been at 2.0). So, I hadn't removed 3.0, just 3.5. In any event, the Windows Installer dialog wouldn't go away. Finally, I did a Restore back to just before I installed 3.5. That got rid of 3.0 and got rid of the Windows Installer dialog. I believe I am back to 2.0 now. I have looked all over for a problem similar to mine. I found two instances. In one, the recommendation was to do some very time-consuming complicated things, including removing Framework completely. Far too much work. I'd rather just stay with 2.0. I should have never upgraded in the first place. The second was easier. They just said to remove ISUSPM from the System Configuration Utility. The person reporting the problem said that worked. Even assuming I could just uncheck ISUSPM and the problem would have gone away, what was causing InstallShield to think something was amiss? (I don't particularly feel like reinstalling 3.5. It took a VERY long time to do.) Thanks for any help.