I'm having problems with a thinkpad laptop running Windows XP. The laptop has a fingerprint reader on it, (not used). I lock the computer and it displays the "This computer is locked and only the administrator... Swipe finger or press ctrl + alt + del" message. However, when i press ctrl + alt + del, the message dissappears, but the "Unlock Computer" windows where I'd type my password does not appear.
The mouse moves, the caps lock light on the keyboard goes on and off when I press the caps lock button, but I just have a blank screen. ctrl + alt + del does not work any more.
If I reboot the computer, it works fine until i lock the computer again.