Can't input password on startup

[zanxxx]

I can't enter text into password field on startup for XP pro. The keyboard acts disabled. A different keyboard gave the same non result. I tried to go back to last working restore point but it just gives me safe mode with the same password input problem. I tried to do a "repair" reinstall of the OS but when it asks for the serial # the same inability to enter it from the keyboard is there. Any advice would be welcome!

[LooseChippings]

What kind of keyboard ...

PS2?

PS2 Wireles?

USB?

USB Wireles?

What make / model?

Have you tried the keyboard on a different machine?

Have you tried a different keyboard?

[alchemist]

Could be u plug the mouse to the keyboard port and the keyboard plug in the mouse port???

That could be the issue i hope u r not using wireless? Coz u can only use it when windows detect it. If u r using ps2, i think ur ps2 port is dead or something....

Gd luck