does the cursor only seize up while you are using it for online / internetactivities?
Yes. Never at other times. Only when I'm online.
This means its not neccessarily a hardware (ie mechanical) problem.
Probablya combination of processor / internet connection hassles.
I reckon you've got lots of old files sitting on your hard drive which are slowing up the processing. If I'm wrong (eg, you've just recently formatted your hard drive) then I apologise for any presumptions.
Hard to tell froma distance but doing a scan disk and defrag of your hard drivewill help...if this hasnt been done for a while, choose an afternoon when you dont need your computer. Defragging is automated but can take hours. Depends on how long since your last defragging.
Like I said, the new mouse wont hurt and may even help but the problem will recur as long as your hard drive, modem and processor are nearing their limits.
If your modem is struggling and/or your server is struggling then it will also clog up your processor.You say that it only happens online which makes me think that the modem needs some updating before the mouse.
Sorry I cant be much help mate. Always easier when in the same room.
Good luck, I think we're all interested in how you eventually resolve this tricky problem.