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I'm using a Windows XP image in VirtualBox.

Then my scroll wheel suddenly began scrolling 21 lines at each tick instead of the usual 3. Why it does this and how can I reset it? It's very annoying and currently the only way to resolve it is rebooting the image...

I searched the web but found nothing relevant.

I don't know what hidden key combination I pressed and I'm also not sure whether its a VirtualBox glitch.

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Go to The Control Panel and click on "mouse", click the wheel tab, and change it back to 3.

That should do the trick...

enter image description here

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It's already 3. But it has a weird 7× multiplier on it. So if I set to 1 it scroll 7 lines at each tick. – Calmarius Oct 17 '13 at 15:40
Do you have third party software installed for your mouse? – TheXed Oct 17 '13 at 15:40
None. Though I use Virtualbox mouse integration disabling it does not resolve the problem. – Calmarius Oct 17 '13 at 15:42
Interesting.... – TheXed Oct 17 '13 at 15:42
Did you install the guest extensions? – TheXed Oct 17 '13 at 15:47

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