hey man this is a great site to get drivers from and it is free to register.
http://www.driverguide.com/
you could always check your bios to make sure they did not get changed in the process. I know i have somehow had my floppy drive turned off without me doing it. I went into my bios and turned it back on then it worked again. I still don't know how it got turned off though. This is just an idea.