|I think response #1 meant getting hold of the actual disk.|
Right click on the desktop, click on View, and then take a look at "Show
Desktop Icons". Make sure they haven't got unselected. If you can't get there in normal Windows see if you can get there from Safe Mode (tap F8 when booting then select it from the list).
Otherwise you should be able to get to System Restore from either the Command Prompt or Run box. Type in this little lot then hit Enter key:
Make sure you get it "exactly" right. If you make it to the restore screen you select a date & time before your problems came along.
Always pop back and let us know the outcome - thanks