how to backup my driver in comptr by dos iff may windows is corupt and cant to repiair. and my disc driver is lost ..

You just want to back up the drivers--that is, those files that tell windows how to use the attached hardware? Don't bother. It's easier going to the hardware site(s) and download the drivers after reinstalling windows.

he's right, it's very difficult. if you want to try and salvage drivers: copy everything from \windows, windows\system, windows\sytem32, and windows\inf into one location (cd or slave hard-drive). mostly you want extensions .exe, .dll, .sys, com, inf, hlp but there's no guarantees on that. More extensions seem to appear with every newer version of windows, so capture all if poss. With Xp, there might be more than i've listed, since i don't have Xp right now i can't say. Also a lot of stuff in (old versions) \windows\options\cabs, but again, I'm ignorant of new stuff.