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I have this Microsoft USB mouse which is unstable with pointer and is flickering a lot. For example, when I open Firefox or other browser or any other text editor, the vertical scrollbar on the right hand side goes from bottom to top and forces it to stay on top. Same happens with any other app which has vertical scrollbar and due to this unstability mouse pointer forces me to stay at the top. Mouse pointer also moves randomly without touching it. I checked to see if it's due to some process and removed svchost.exe which was taking more load, removing it from task manager temporarily resolves issue but it keeps on persisting.

Is it issue of USB port or mouse has reached it's end of life cycle ?

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Sounds like dust got in your mouse's optical receiver. – digitxp Sep 6 '11 at 13:22
I am curious as to what service should be affecting it. Assuming you are running Vista or later, if you right-click the relevant svchost.exe instance in the Task Manager and click Go To Service(s) then which service is highlighted? For how long does this resolve the issue? In the mean time, do you have any special drivers installed? Have you tried a different USB port? Have you checked for viruses? If you know your way around with the keyboard then you could try uninstalling/reinstalling the mouse in the Device Manager. – James Sep 6 '11 at 13:29
@digitxp : It sounds as though he is having issues with scrolling as well which would suggest it's not just the optical receiver that is faulty. – James Sep 6 '11 at 13:31
I'm using windows XP SP3. No extra drivers installed as it detected the mouse with generic MS driver. I don't have mark's process explorer, so not sure which process is affecting the mouse. No viruses. Checked on 2nd port, same issue. I'll check if reinstalling works. – Mahesh Sep 6 '11 at 13:39
If you open the Task Manager you should be able to get the PID (Process Identifier) of the relevant svchost.exe instance. If you then type tasklist /SVC into a command prompt it will show you the service(s) associated with each svchost.exe instance - you can match it up using the PID. – James Sep 6 '11 at 14:07
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The issue with the system was with the faulty mouse. The old mouse had issues related to the tracking and now changing the mouse with new USB mouse resolves the issue.

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