Auto Scrolling of Page

[skghosh44]

Recently I am facing a problem. The problem is when I open any page in any program such as Ms Word, Excel, Notepad, any browser like Mozila, Chrome, IE, the page automatically scroll down to the end of page. Whenever I try to scroll the page to the desired position, I could not stop the page. I checked the system with Antivirus, but there is no problem found.
My system is duel boot system with Win XP SP-3 and Windows 7. In both the OS I am facing same problem. Even in the safe mode the problem is same.

Is it a virus problem or Hardware problem? Otherwise my system is 100% OK.
Please give me some light to solve the problem with out formating the OS.

[rhitwick]

A very possible guess: try to check if ur mouse's middle button is somehow pressed down.
Its a default property of mouse for auto scroll.

[Gauravs90]

try disconnecting first keyboard and check if problem persist, if yes then try disconnecting mouse and check if problem persist, if yes then your computer have internal problem.
thx

[skghosh44]

Thanks both of you. You are both right. The problem is with the mouse. As soon as I changed the mouse the problem is solved.