XP Pro mouse problems

[Guest]

Recently I have experienced mouse problems in XP Pro. For no obvious reason the cursor will suddenly move all over the screen activating menus.
I have formatted the hard disk, re-loaded and updated XP Pro, updated the BIOS, replaced the video card and loaded the latest drivers.

I have scanned for viruses, Trojans, worms, spyware.

Nothing I have done has the slightest effect, the problems occurs while using XP Pro and all programs

Does anyone have any ideas as to the cause?

Regards

Gerard

 

[R. McCarty]

Did you try an alternate mouse ? Is this a desktop or notebook ?
Is the mouse a standard "Ball" type or Optical and how does it
connect (PS/2 port or USB)?