I am not sure if its this mouse as it has happened on another computer that was also running windows 7, or the OS. It is a simple Microsoft wheel mouse that is PS/2 compatible(says so on bottom of mouse). It can be corrected by unplugging and re-plugging the mouse. Its clicks work, but the mouse will move in short jerks as I move it all over the place.
Or maybe I should get a different type of mouse.
Windows 7 64 bit
Asus p7F7 Supercomputer with Xeon X3450 2.66 Ghz (bios revision 602)
8 GB of Kingston 1333 ECC
EVGA Nvidia GTX 560 Ti
138 GB WD Hard drive (OS, partitioned to 7 and XP)
650 GB Hitachi (Data)
Some Sony DVD/CD burner
CoolerMaster Silent Pro Gold 800W