This computer may have physical damage, or it may just be a corruption in Windows. BSOD (Blue Screens of Death) are difficult to completely debug, and often the best approach is to backup any important data you have on the computer, do a complete system recovery, and see if the error continues. If it does, then you know it's a hardware problem, and that will require partial dissassembly of the computer and further testing work that is best done by a technician.
So, at this point, I would reboot the computer and plug in a flash drive or hard drive large enough to backup any important data you might have. Pictures, music, documents, etc. If you don't have any, you can skip this step.
Then, once you are ready to wipe the drive, turn off and turn back on the computer. With an HP, you should be able to hit F11 key and follow the on screen prompts for recovery. If this doesn't work, you'll need to use the recovery cd's or dvd's you got with the computer (boot off them). If you can't get either of those to work, you can follow up with me for further instruction.
Please click on accept button if this answer has helped you, This is how we computer experts get credit for our time spent helping you. There is no additional charge for clicking accept. I'm here for follow up on this question even after accepting my answer. Positive feedback and bonuses are always appreciated.