^Here is the Guru whom you can count upon.
Well on the question of system file checker,how do I check all the files?What command should I put in?Once, the installation of Zonealarm for Vista failed midway resulting in BSOD. Though Vista repaired the problem itself, I started getting "Windows explorer encountered an error and closing" frequently.To circumvent this I restored the system to a previous date 28 Sep 2007. After that the windows explorer problem vanished.Perhaps I could have run sfc to check and repair all system files. And hence this question.