Specs: HP dx2300 -- XP Pro SP3 -- Logitech Trackman Wheel USB mouse (wired)
Problem: Applications constantly scroll up and down (intermittently will stop for a period of time then start scrolling erratically again). This happens in all applications; FireFox, Notepad, Task Manager, etc.
I have not changed anything in my hardware setup recently.
Troubleshooting steps I have tried (to no avail):
# Unplugged Trackman Wheel mouse and plugged it back in
# Tried different USB ports
# Rebooted computer
# Took apart Trackman Wheel mouse and blew it out with compressed air (was not very dirty inside)
# Unplugged Trackman Wheel mouse and plugged in brand new HP Optical USB mouse (wired)
# Installed latest drivers -- Logitech SetPoint (the problem was happening without SetPoint installed so I don't think it has anything to do with that)
# Ran scans for viruses -- ran Malwarebytes full scan (updated first) -- ran McAfee Total Protection full scan (commercial version) -- neither found any infected/threatening objects