While my PC was booting, there was a brief power cut. Ever since it says there was an error loading a couple of vxd files during boot and I need to restart. It will however boot without problems as long as the windows disc is in the drive.

I have tried reinstalling windows over the top but that didn't have any effect. Any suggestions, preferably without formatting etc as it is a family PC with a lot of things on it and I'm not there half the time to do anything major? I can't remember the exact 2 files, but I can find out in a week or so when I go home.