Keyboard is disabled after booting Windows XP Pro

[Guest]

My win XP machine has suddenly started disabling my keyboard on Windows
bootup. This applies to both USB and PS2 keyboards. The keyboard functions
properly until the windows screen appears with the Blue oscillating bar under
the windows logo.

In device manager the keyboards have yellow exclaimation point beside them
indicating a problem. The properties window says that windows loaded the
device driver but can't see the hardware. This is screwy since I can unplug
either keyboard and when I plug it back in, Windows PNP sees it, reloads the
driver, and then shows the device with a problem.

I am out of good ideas. Does anyone have any new one or has anyone
experienced the same problem?

 

[yabbadoo]

Assume your mouse is working. In device Manager, uninstall all keyboards,
close down, reboot with PS2 keyboard plugged in. Should work with PS2,
that's a generic driver.

For USB - is it to a permanent (hard) port or through a hub? Should be
permanent port. If PS2 k/b now works, then I'd suggest uninstalling all USB
references, shut down and connect ONLY mouse/keyboard. XP will then
detect/reinstall all USB drivers/controllers correctly.

HTH Len.