I've accidently locked out the USB ports including the USB Keyboard input

I've installed the interset Lockdown s/w on to a HP K8L27E#BU Mini Desktop PC. Unfortunately I disabled the USB inputs, and on a reboot the PC doesn't accept any keyboard input as the keyboard is a USB keyboard -- Silly me!

How can I get out of this mess

Any help much appreciated

If you plug the USB keyboard into the same port as it was originally, it should work while Secure Lockdown is enabled (because the keyboard driver was already installed for that port).