My computer started acting up - when I move the mouse down, the cursor moves up. Movement side to side is correct. I have an optical wireless mouse. To make a long story short, after trying a vairety of things (rebooting, reinstalling mouse, doing some troubleshooting with video card), I replaced the battery in the mouse and that fixed it. I never would have thought a weak battery would manifest itself in that way - thought that might be of interest to you all.
LenC, who is the maker of that mouse? My Microsoft Wireless Mobile Mouse 6000 has a built-in battery indicator at the top, that goes from a steady green to a blinking red when the battery is getting weaker.
It's Microsoft. I must admit - I ignored a couple of popup errors on the screen warning me the battery was low. I've done that in the past until the mouse was totally dead, at which time I replaced the battery - won't be doing that again
Check that the surface is suitable for your mouse, certain wood grains effect the mouse negativly as the light isn't reflected back consistently, the best surfaces to have are light plain colours.
I understand that can be a problem, and I did consider that. But as I mentioned above, it was clearly the battery in this case. Thanks, Len
