I don't know mate
I know I just had to reformat and reinstall, and I lost all my audio and graffix drivers too (but I'm on win98SE and have onboard graffix and sound as my PC is oooooooooold

)
I eventually with some help from peeps on here found and installed new VGA drivers and chipset audio drivers so all sorted now (except my USB plug in card reader/writer won't show up even theo I installe dthe software for it

)
So just keep bumping till someone who knows what the problem is reads it pal