I have a Kensington PilotMouse Optical that I started using recently. What happens is... when the mouse sits idle for about ~3-4 seconds, the pointer becomes unresponsive which it doesn't move. The mouse resumes normal operation if I move it enough -or- if I lift it off of the mouse pad.
It's quite annoying at times... in cases it makes it very frustrating when playing any online FPS games where a correctly working mouse is crucial.
Try disabling "USB Selective suspending" in power. I got the same problem with my USB Keyboard turning off until I press a button 2 times (1 to wake it up)
------------------------------HP Pavillion a819n Desktop: Pentium 4 HT 3.2 GHz | nVidia™ Geforce 6200 PCI 256MB | 2.5GB DDR | Maxtor 200GB | Win XP Pro
If I helped you, Select my post as best answer. I like to feel smart