Any keyboard is not working with this XP

I have tried any Keyboard but they are not working with my PC. I reboot PC but no luck. Please help.
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Is this a PS2 keyboard, the kind with a round connector?  These PS2 ports often get burned out because people think they can be hot-plugged/unplugged.  If this happens, switch to a USB keyboard.

Phucnguyen01Author Commented:
I have tried PS2 and USB. Neither is working.
Does the numlock or capslock lights toggle at all, like while the PC is rebooting, etc.?  If so, try tapping F8 once per second after a reboot, and select Safe Mode from the menu.  If that is successful, do a system restore to a time when it was working.
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Phucnguyen01Author Commented:
The numlock or capslock lights is not toggling at all. I have tried to select Safe Mode from reboot I still can not login into computer.
Phucnguyen01Author Commented:
Hi Patrickfromsc,
One thing just let you know that Keyboard works fine during BIOS startup.
Phucnguyen01Author Commented:
Another thing, after I went to BIOS and exist to reboot PC, I got message: Setup Entry Key Detected".
Does a PS2 keyboard work in the BIOS?  Or only USB?  And if you are using a USB for the first time, you may need to enable USB Keyboard / Mouse support in the BIOS.  Also, a new USB keyboard will often take Windows XP a few minutes to detect and load drivers for, so you may try hanging out at the logon screen for 5 minutes, in the hopes that it has detected it and is loading drivers.
it seems your mother board has problems; to be sure, boot from a live cd, and test if the hardware works ok :      Knoppix                                     BartPe
It isn't the motherboard if it works fine in the BIOS.  My guess is that PS2 isn't working because the ports are bad, and USB works in the BIOS but not in Windows either because USB Keyboard support isn't enabled in the BIOS, or because Windows hasn't had enough time to install the drivers and make it active.
well - "PS2 isn't working because the ports are bad" that is the mobo imho
Phucnguyen01Author Commented:
Both PS2 and USB are working fine in the BIOS but not in Window XP. Another thing I just found out is both PS2 and USB keyboard are working in window but so delay that mean if you want to type you should hold key for 2 second for every single character. In BIOS there is no delay.
So I do not think PS2 or USB problem. Please help. Thanks
then your question is completely wrong, the keyboard does work.
but your OS does not work as it should.
options : a fresh XP install --> the best !
a repair install :      
run sfc /scannow from the run box
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A simpler solution may be to run msconfig and disable any unneeded services and startup items.  You can get to msconfig by hitting Start, Run, and typing "msconfig" and enter.  On the Services tab, check the box that says "Hide all Microsoft Services", then hit "Disable All".  On the Startup tab, hit "Disable All".  Then hit okay and reboot.  If Windows behaves properly, then you can systematically re-enable services and startup items until you find the culprit.
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