I've tried 4 different mice on this laptop, as I prefer them greatly over the eraser head and touch pad, and none of them will connect. 1 is a Targus, wired mouse that worked last week, and suddenly does not anymore, and the other 3 are Microsoft wireless laser and optical mice. All of them use a USB to plug in, as my laptio doesn't have any of the circular mouse ports. I've tried changing the batteries, finding software from Microsoft, Control Panel Hardware-Adding, Troubleshooting, Rebooting, Disconnecting and Re-Connecting, and now I'm all out of ideas. The wireless mice has receivers that keep a steady green light, but the mouse itself won't budge. http://tinyurl.com/mouse1 is the 1st wireless mouse, where the receiver will keep a constant green light and the mouse won't respond. http://tinyurl.com/mouse2 is the 2nd wireless, where the receiver will blink green when i hold down the butotn, but will stop once i let go, and I have tried to oress the connect button but that won't do it. The red laser on the bottom stays lit, but it simply won't go anywhere. http://tinyurl.com/mouse3 is the new, fresh out of the box wired mouse that worked for several days, but now will not work. I plug it in, the laser comes up underneath the mouse and stays on, but the cursor will not move. I tested it on another laptop where it worked just fine. I'm not sure where on the computer I should be looking to find how to fix this. I've looked at the BIOs, but have had no such luck. Running on Windows XP Pro. Any and all help s appreciated. P.S. soryr if this is the wrong area for my thread, wasn't sure if this should be in "Other Hardware" or not.