Your mouse is hovering by its own.... sometimes, you might have :
1. working without mouse pad.... so use one.
2. the mouse speed on the windows... has a FAST setting... so go to control panel and mouse, and adjust to the proper speed
(dbl.) click speed and motion).
3. the version of the windows you are using counts sometimes, may be the mouse brand has to be configured (with its own
driver (cd) on the windows... instead of the generic configuration).
4. if it is a w/less mouse, pls. try to replace your batteries and try for sometime.
5. if it is a PS/2 mouse.... probably the port on the computer is getting loose or not tight anymore.
6. if it is a USB mouse, the port may be not perfectly configured, pls. try to re-configure the USB on your windows (using the
motherboard CD (that came with the system), or update the latest USB driver for that particular MB from the inet.
7. you might have a virus !!! yes viruses sometimes keep mouse panic, have your system scanned, checked and cleaned.
You can skip step 6. if you get another mouse and check it with your system.
Hope i have covered most of the probabilities that might be the case

.
Good luck and happy mousing
Asmar
[MCSE, MCP, MCT, A+, SUN ADMIN, NW+]