Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

It's only a minor thing but i can't solve it.

I have a ps2 mouse on win xp sp3. the wheel has stopped scrolling in all apps however in apps that support it i can click the wheel and bring up the scrolling four way arrows and scroll that way.

I've tried uninstalling the drivers and changing the wheel settings but to no effect.

It obviously recognises the wheel since i can click it.

Any ideas super users?!

share|improve this question
Have you tried a different mouse? The wheel rotation sensor might be bad. – Daniel A. White Aug 24 '09 at 12:48
Your answer is in here, how about awarding somebody the answer vote? – kmarsh Aug 24 '09 at 13:08
up vote 3 down vote accepted

The wheel click and wheel rotation are to completely separate sensors. You've got a broken mouse on your hands.

share|improve this answer
right you are. i didn't realise the two were different or i would have assumed it was broken... – Charlie Bear Aug 25 '09 at 22:12

The scroll wheel works by breaking a beam of light with spokes in the wheel. If there is dirt in the small spokes the the beam of light is always broken and scrolling won't work. Open up the mouse or trackball and blow out the dirt. I just installed a different trackball to ensure that scrolling works in the OS. It does. So I cleaned out the one that didn't work and now it does.

I hope this helps.

share|improve this answer
I think it is improbable that all the holes in the wheel would be filled by dirt. Normally when dirty it should work at least partially. There could also be some dirt on the LED or sensor. – pabouk Oct 23 '13 at 20:33

Option 1: make sure the scroll options are still turned on. This is done in the mouse setting in the control panel.

Option 2: Get a new mouse. Yours does sound broken. :)

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.