I use the Logitech MX-700 cordless mouse. I wiped my HD and re-installed WinXP last week in a bit of late spring cleaning. Since the re-install I've had intermittent problems with the mouse. It will occasionally stutter quite badly. A simple glide of the cursor across the screen turns into a 2 minute fit of frustration as the mouse looses responsiveness. The odd thing is that it'll go whole periods when everything seems normal. I have spent the last week searching for a pattern of running software but can't find anything that could be causing it. I'm running the newest Logitech drivers. I wonder if it could be a motherboard USB problem (Abit KR-7)? Not sure. Another oddity: when the stutter begins I've found that plugging in my old Microsoft optical mouse (in addition to the Logitech) makes the Logitech return to normal. Odd. Any ideas?