Keys Getting "Stuck", Not Physically Though.

Hi guys!

I have come across this problem, which I have never had before. It came across all of the sudden, I didn't even Install/Download anything that could have triggered it.

When I am typing, whatever key that it decides it wants to trigger itself, will be "stuck" and repeat. It has happened to me 3 times even while typing this. While this "stuck" event is happening, I can't press anything else on the keyboard, only clicking.

I have a Microsoft Wired 600, quite a plain and simple keyboard that I have had for 3 months. Here is a screenshot I took when it happened to me.

http://i.imgur.com/RoPKT.png

The only way I can fix it is by unplugged/plugging back in the USB. Only for it to happen again maybe 2 minutes later.

I have tried putting it into other ports but nothing has worked so far. I have also tried 2 other keyboards and the same problem is persisting.

Thanks for any help!