Um if you have another computer, I think
you can put your install disc (for whatever OS you have) in and open it up and find all the core drivers
like that. Then put it on a flashdrive. Put an Linux Live Boot CD into your problematic computer, boot off that, and copy it off the flashdrive into the appropriate folder. (I also discovered a way to use the repair options that are either built into your comp or on your install disc to access files when you can't any other way, if you want. But it's more complicated) If you want to try that and don't know how to do any or all of that, let me know and I'll try to guide you through it. Also, if that doesn't work or you don't want to try that for whatever reason, you can use that Linux Live Boot CD to get the "Valuable Information" off your computer.