you mentioned when you booted to safe mode the problem went away....did you have network connectivity in safe mode??? perhaps it is your network connection causing the interruption maybe the display resolution you have in normal mode is too high...again safe mode's would be lower... just something to think about...is anything else attached USB, scanners, printer, PDA, cameras, MP3...that you have in noraml mode try unplugging these to see if that eliminate the issue:WTF?: