I had a major problem with my pc. I ran norton speeddisk and all was well after it eventually finished(I have a 200 gig drive).
The next morning when I switched the pc on, it gave me a disk error when it normally starts to boot into windows. Turns out my boot file was corrupted somehow so I used the xp disk which wrote a new file and allowed me to re-install windows. My harddrive now appears empty(apart from windows), when previously, I had filled about 90 gig. Is there a program which will allow me to recover any of the info which I know is still on the disk but windows will not recognise is there?(I know this will teach me in the future not to make a backup).