Mouse Scroll Wheel jumping

Thread starter #1
I have never encountered this kind of problem before my mouse(Altos SPIDER AL-G2600) was just fine till i updated my windows 7 to service pack 1 after that i got the problem,tough i tried putting in another port not working device update nah it's already updated and windows update mouse works fine on other pc's with service pack 1.

What could be the problem?

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