Here is my taskbar issue.

 

Every now and then, a blank taskbar item pops up and then disappears rather quicky. When I have managed to catch it and click on it, noting happens.

 

It disrupts game playing, causing the screen to minimize and return to the desktop.

 

Otherwise it doesn't seem to interrupt anything else.

 

Any ideas? I have run spyware and spybot. My computer seems to be clean.