I am facing a strange problem for the last few days.

After I bootup and couple of minutes into my typical work (like opening some files and folders or opening some browser windows for surfing), a strange thing happens.
The mouse pointer becomes jittery and wildly jumps across the screen. The right-click menu on the desktop opens, The Start menu opens by itself, 'All programs' menu gets activated, some programs open, some folders open (esp. the Start Menu Folder), some new shortcuts gets created on the desktop, some renaming window opens, some right clicks take place, some programs get pinned, some gets unpinned ....... and all these happen at a rapid pace on moving my mouse a little !!

This madness stops after about a minute and then I have to close all the unneccessary open folders and programs manually, delete new-born shortcuts from my desktop and then and then continue with my work only to face this crazy thing again after a few minutes !

Is this some kind of a dangerous virus ?
Should I re-install windows ?
Is there a problem with the mouse (PS/2 Compatibale Mouse) ?

I am clueless.

Please help asap.

Regards,
Suddha