HELP! – odd usb behaviour

Hi,

I am having very annoying problem. Maybe you will be able to help me.

I am using Acer 5920G laptop running on Vista Home Premium with an ordinary corded usb mouse. My laptop has 4 USB ports: 1 on the right and 3 on the left. I usually plug my mouse into right port.

Some time ago during usual usage my mouse stopped working. The light was off and it looked like it was not getting any power. If I plug the mouse into other port it will be detected and it will work.

When I check device manager with mouse unplugged it is still there (as HID compliant). When I check that devices hardware ids they are different from when I have my mouse plugged in different port.