|For a start, please turn off CAPS, it's considered to be shouting.|
The phrase 'last version of its hard-drive' makes no sense, do you mean that you want to use System Restore' to take your computer system back a couple of days? In which case it's under Start/(All) Programs/Accessories/System Tools/System Restore.
If you mean something else, please post back and phrase your question more clearly.
"I've always been mad, I know I've been mad, like the most of us..."