fix partially working keyboard

fix partially working keyboard

1. Keyboard not working windows 7
2. backspace key not working properly
3. Enter key on my keyboard is not working in Windows 7
4. Tab Key Not Working in Windows 7
5. Troubleshooting keyboard issues - ThinkPad
6. My "Enter" key does't work
7. Windows 7: Enter Key and Tab Key stopped working in Win 7 x64
8. Use the On-Screen Keyboard (OSK) to type
9. Enter key non-responsive
10. Remapping the Keyboard Layout in Windows XP, Vista, and 7
11. Enter Key not working
12. Enter Key not working