I had a similar situation a few years ago and 
found that it was a corrupted video driver.  I 
removed the device and reinstalled the driver and 
fixed the problem.  Also check mouse settings in 
Control Panel to make sure the correct type of mouse is being detected.

Doug

At 3/29/2010 12:02 AM, alan smith wrote:

>My computer, about 4 years old. OS XPpro sp2, 
>has been working perfectly every  day
>until 2 days ago.  I move the mouse, & it may 
>jump anywhere  on the screen. And I mean 
>anywhere. It doesn't head for any spot, although˝
>   most jumps at to a side or off screen!
>I replaced the mouse ( both optical ) & still 
>the same!! Now that I'm writing this, it's 
>working perfectly!!!! Anything else, programs, 
>solitaire, web sites, it's no go. Does anyone 
>have a suggestion?   Many  thanks,  Al Smith

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