Keyboard/Pointing Device Locks up

I have a laptop running Windows XP Pro.

When the laptop is undocked, and I boot up the machine, everything
works until I get on the sign on screen....both the keyboard works,
and the touchpad/mouse. I can wait 10 min or so at the sign on screen
and everything is fine.

Once I do a ctrl-alt-del and logon, 50% of the time, the keyboard and/
or touchpad/mouse will lock up and stop working. The only way to fix
it is by rebooting and hoping on the reboot there are no issues.

A look in event viewer shows the following message:

Event ID 7000 - The parallel port driver service failed to start due
to the following error: The service cannot be started, either because
it is disabled or because it has no enabled devices associated with
it.

This laptop does not have a parallel port.

Any thoughts how to resolve it?

Thank you