Hello all, virgin poster here. My kit is comprised of an Advent 3209 tower,withPent4 2GHz,Mobo is Elite L4S5M with SiS645 & 961 chipsets running XP Home. My problem is erratic movements from my standard mouse, which starts a few minutes after boot-up. Pointer clicks to lower-left corner randomly, and any movement of the mouse causes multiple windows to pop up, eventually resulting in freeze-up. Keyboard works through this in a limited fashion. Clearance of fault requires a COLD boot. Changed the mouse to a known good one, anti-everythinged the hell out of it, got all the updates available. Fans all working, and am not taxing the CPU. Tried TrendMicro too. Left a wedge of Cheddar on the mat overnight. Still no go. Any mouse tamers out there? This problem is really starting to get to me.