Hello Bangell,
Thank you for posting your question on Microsoft community forum.
I would like to know some information about the issue so that we could help you better.
- What is the make and model of your laptop?
- Did you make any hardware or software changes to your computer prior to the issue?
I appreciate you for providing details about the issue and your efforts towards resolving it.
This issue may occur due to corrupt device drivers or settings.
I would suggest you to try following methods and check if it helps.
Method 1:
Run hardware and devices troubleshooter and check.
Refer:
Open the Hardware and Devices troubleshooter
http://windows.microsoft.com/en-us/windows7/Open-the-Hardware-and-Devices-troubleshooter
If it does not help, use method 2.
Method 2:
Please use suggestions provided in this Microsoft knowledge based article and check the issue.
Refer:
Troubleshoot wired keyboards that don't respond or that type wrong characters
http://support2.microsoft.com/kb/258826
I hope this information helps.
Please do let us know if you need any further assistance.
Thank you