Hello all. I have a friend that has a Dell Inspiron 1100 laptop. He had some virus problems and in the process of fixing it he killed a boot sector in Windows

. I used my XP home upgrade disk to repair the install (because he can't find his recovery disk). But now when I boot into windows at the desktop there is a error COMRes.dll was not found, and I can't click on any thing. I would like to know if I could just reinstall Windows with my XP home upgrade disk and his serial key.Would this work?