Thanks. I don't seem to have a repair disk. How can I boot from a USB? Is there anything I can download onto a USB from my laptop?
Okay.
In order to boot from a USB you will need:
-A USB at least 2 gigs big.
-Access to a second computer
-Your original version of Windows <whatever> on CD
-A BIOS that allows booting from USB
Okay, so what you need to do is pop the CD into the other computer and open it up, install Windows <whatever>, but instead of installing it on the harddrive, make sure it's on the USB. Once that's done, you plug that into your computer, and see what happens.
If you get as far as plugging the USB into your computer and nothing happens;
See if you can get to your BIOS and check and make sure that it does actually allow for booting from USB.
If you do not have your copy of Windows, then try what the other guy suggested.