I have a Vaio and it came with 3 application recovery discs and 3 system recovery discs. I was told to restart my computer with the first application disc in the cd rom and then go from there. But my friend doesnt know if that will default the C and/or D drive and thats what i'm trying to figure out. I have a lot of files on D drive that i need to keep. So if i do "wash" my computer and put it back to the way i bought it, can I clean just the C drive and leave the D as is?