it just restores ur computer to how it was at an earlier time so any changes, new programs that occured after the restore point will be undone however new files will still be on ur system.
..First of all.., you should check your memory and disk drives... You can do this by pressing the esc button while on the boot up screen... This will take you into the BIOS screen... Go to...
No - system restore is designed to 'roll back' your computer to a point in time before a problem occurred. It will undo installations, but not restore deleted files.