I recently had some crashing problems with explorer.exe (which I'm hoping an update has fixed.. Looks good so far). However, I tried to use System File Checker (Start / Run/ SFC /scannow) and it started.. But that was about it. It said to insert my Windows CD (and I did just that), but it said that I had the wrong version (It has worked before this though). Do you think that my recent trip to WindowsUpdate has made SFC impossible to use now? What should I do if I ever need to use SFC again?