Scrolling pages jumping

Take the roller ball out of the bottom of your mouse if it's the older style and clean the dirt and dust of the roller wheels with a q tip and alcohol. If it is an optical mouse try putting a piece of white paper under it when you use it this may help. If not it is time for a new one.

Get the appropriate driver for your OS.

your scroll wheel is most likely of track

Try another web browser, like Google Chrome or Mozilla Firefox. If the problem persists, check your mouse settings under Start>Control Panel

This could be due to incorrect mouse settings. It may also be an issue with smooth scrolling in Windows. You can try both disabling and enabling smooth scrolling to see setting performs better.
Some related tips can also be found here:

http://answers.microsoft.com/en-us/windows/forum/windows_vista-desktop/smooth-scrolling/d60338a5-3997-41b5-9784-7345aafd3593

Go to the link below and click on the model you own... Then scroll down to the TouchPad driver and download the one for the Synaptics version. Once it's downloaded unzip it. When unzipped go into the folder it created and double click on setup.exe and follow the instructions.

http://support.acer.com/us/en/product/model.aspx?pid=2072&sid=2790

Good Luck!

It is possible you might have picked up a virus, or a bad device driver. Try a system restore taking the computer back in time before this happened, may resolve the issue.

No, it is not a issue with your graphics card.. The middle roller of the mouse is messed up & it can not be fixed.. You have to buy a new mouse & the problem will resolve :D

check your mouse settings in Control panel, adjust accordingly...

My guess is that the scroll-wheel is being pushed down, even when you don't think that you are touching it. It might be "locking" in the "down" position, thus causing it _not_ to work when you do try to scroll.