Computer: Optiplex 980 Win7-64bit

Keyboard: Dell U473D  M/N: Y-U0003-DEL5

If I unplug the keyboard and plug it back in, it stops working. If I unplug it and replug it into a different USB it will work, if I plug it from that USB it will not work from both USB ports.

It might need a new driver.

I tested a different keyboard (DELL SK-8115) and it worked all the time no matter how many times it was unplugged.

Is there a keyboard driver or some USB driver that's needed?

Jorge