Can you try different keyboard please.
If you have a Windows XP CD with service pack matching the installed Windows XP service pack insert the Windows XP CD and open Command Prompt and execute following command:
Above command will repair any corrupted Windows XP system files.
If you have a Windows XP CD with service pack matching the installed Windows XP service pack insert the Windows XP CD and open Command Prompt and execute following command:
Code:
Sfc /Scannow
Above command will repair any corrupted Windows XP system files.