Hi, I am facing a strange problem with my winXp pro installation. for some time now, whenever i try to show the hidden folders and/or system files by tools--->folder options----> view and setting to show the hidden folders and system files .....the system turns to the default settings automatically and my preference does not get saved. I ran full scan with Avast home and spybot s&d but no threat detected even with the latest definitions.Please help me overcome the problem.do i need to reinstall windows?