|If I'm not mistaken, most HP laptops have a hidden partition and will allow you to do a non-destructive restore as well as a destructive restore. You would want the non-destructive restore.|
It should tell you when you are booting up, I think it says restore PC, but I'm not too sure on that...could be f10 or f11, etc.
If that doesn't work:
try a repair install if you have an installation disc:
Some HELP in posting on Computing.net plus free progs and instructions Cheers