Common errors messages
- You log on by clicking your user accounts, but then you can’t open any programs
- Your computer displays the Windows logo, but fails before you can log on
- You see “Non-system disk or disk error,” or a similar message
- Your computer stops immediately after you turn it on or displays nothing on your monitor
- Your computer does not turn on
- You need to perform a repair installation of Windows XP
- Remove external USB Devices and Floppy Disk/CD
- Check for loose cables connectors
http://windows.microsoft.com/en-GB/windows-xp/help/setup/how-to-fix-computer-that-will-not-start