I have a Laptop which is powered by Windows XP. I wanted mt laptop to be upgraded with Windows 7 but I could not sufficient hardware requirements so I am maintaining the same and that is works fine still last night. Now the problem is, cannot install or uninstall programs using XP Home SP3 on my laptop. Nothing happens if I use either Uninstall from the program files or Add/Remove Programs from Control Panel. Is the msiinstaller have been corrupted.