My system is driving me nuts with the constant re-appearance of a dialog box titled "Microsoft Photo Info". The error message is:

Folder path 'Program Files' contains an invalid character.

I have a seperate directory named Program Files that is on hard drive G:\ because my C: drive is getting full, so I'm installing any new software to G:\Program Files. Most of my old software remains on C:\Program Files. When I tried to uninstall Microsoft Photo Info from the Control Panel's Add/Remove utility, I got a "Fatal" error message during the uninstall. Then I physically deleted the entire folder for Microsoft Photo Info and cleaned the registry with a cleaning utility. I still have the problem. As soon as I complete an AVG virus scan I'm going to re-boot and defrag both C:\ and G:\. Maybe that will help. Any ideas?

ps: My various Microsoft add-on software such as IE7 and Microsoft Photo Info has been causing much more problems, proportionally, than any of my third party software.

More from me about this problem. It seems that it's related to the Microsoft Installer which, for some reason, is going on all the time and then the error message appears--this time also for the PDF reader. I restored my computer to an earlier point but no luck.