did you update any drivers ? are you using a usb, serial or Bluetooth GPS ? As I posted in the other thread, Blue Screens/Reboots/Total Lockups (which include mouse/keyboard) are normally signs of DRIVER or hardware issues. Software issues normally don't cause the OS to quit. The increased memory and/or CPU load from the new GPS software may have triggered the issue, but it's unlikely it's the "software" itself.