How cheap is the mouse? I've got worse than that.... In windows my mouse goes ape**** and jerks around. It does this in FPS games as well. Multiple machines. Multiple cheap USB mouse devices. The common thread is "cheap".
Yes, I followed several tips found on the internet about this. None worked. Even MS's help database steps for removing old mouse driver entries from the registry didn't help.
Some think it's a driver problem in Windows mouse drivers. I don't know.
So, either you COULD have what I have....
OR
You moved it to a rough spot on the mouse pad and the optical sensor was seeing a bump or a hair and thought it was still moving.
I've got the former, you might have the latter. I thought I'd mention both just in case.