I can not open any programs by double-clicking any icons. That includes the desktop, the control panel, and my documents. I have to right-click the icons and select open from the short cut menu to open the programs.

check ur mouse settings under control pannel, disable active desktop, or if worst comes to the worst re-install windows.

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MS Quote: What do you want to re-install today? Windoze...

Thanks Aussieolie2. It worked.