Your statements aren't quite clear. So, if you could help us out we can find out what is going on. First what is the D: Drive? Is this a CD/DVD or is it another partition or external drive? How did you backup your files? Did you use a program? If so, you will need to use that program to restore your files.
Right click the Start button and choose Explore. In the Windows Explorer, go to Tools/Folder Options/View put a check in the radio button for Show Hidden Files and Folders click Apply and OK. Can you see your backup files now?
Right click the Start button and choose Explore. In the Windows Explorer, go to Tools/Folder Options/View put a check in the radio button for Show Hidden Files and Folders click Apply and OK. Can you see your backup files now?