Recently my Windows 8 started scrolling anything that can scroll by itself (with no user interaction at all).
Shortly after I open a web page in IE or Chrome and start reading, the page scrolls down a little. The same happens in Visual Studio, Word or anything that can scroll.
Even the Windows 8 Start Screen scrolls a little to the left shortly after starting Windows and continue to scroll a little to the left after a while and continue to do that repeatedly.
I tried reinstalling the mouse driver, but it didn't help. Then I tried unplugging the mouse, but pages are still scrolled without any user interference at all.