- Try scan your computer with anti virus and anti malware or spyware program
- If 1. still can help you try to make system restore. choose the date before the problem started
- You also need to check on the task manager to make sure that is no running programs
- You can also make a checkdisk maybe the hardisk having problem
- Insert the Windows CD the boot it..and go to repair windows
- lastly if all step cannot help you..and this ways is need to choose..format it..but remember you need to backup all your document...