For the pros: Standart Keyboard does not work / unable to login

> Hi,
> I had a Logitech USB Wireless Keyboard installed via USB. Everything
> was running smooth. Now I had to switch back to a normale keyboard and
> a normal mouse, but when Windows XP boots, the login screen starts, I
> can move and click with the normal mouse, but when I hit a key on the
> normal keyboard, the system freezes. I can do nothing.
>
> The normal keyboard works, I can press F8 during boot and select the
> different starup options, but no options help. This error occurs every
> time. I do not have to USB Keyboard at hand to plug it in, that is the
> difficulty.
>
> Are there any solutions I could try?
>
> Bye