This is a new wallmart mouse it worked well for some few hours, now it moves the arrow L D R ok but up is where it fails sometimes it will go up sometimes it won't ,, windows xp home help says I may need to download a driver,,,the mouse is,,Micro innovations,, KB945C. if you can help,, thanks,,,Tom.

Computers & Internet - Micro Innovations - Micro Optical 3 Button Mouse PD450P