Uhm, thats a bit of an oddly phrased question. But..
You can restore your laptop to the hard drive state it was delivered to you. If I recall - press F8 shortly before the Windows logo shows up when you boot your computer. Then there should be a 'repair' option in the list that shows up.
Keep in mind that this will delete ALL data on the machine. Photos, movies, programs - everything will be gone. Things you want to keep should be stored stored either on another computer, CD/DVDs, external hard drives, on a Web server or cloud server, or flash drives (USB Drives).