The problem with my microsoft 6000 v2.0 keyboard is this. I have changed batteries (4x with brand new), the light on keyboard comes on, then after about a minute, the light goes off and keyboard does not work. I have tried pushing reset button on bottom of keyboard to resync....light will still not come on. Have tried rebooting computer..still no luck. Mouse does work, just not keyboard. (I am sending this from another computer in case you were wondering how I am typing..LOL). Any assistance would be appreciated.

Not to sound patronizing, did you push the buttons in the order it requires you to? The sequesnce and timing is important. Also, the keyboard and mouse have to be pretty close to the receiver, and the receiver need to be almost completely in a direct visual line with the devices on these MS keyboard desktop sets. I had a lot of trouble with mine until I put the receiver within 1-1/2 to 2 feet of the keyboard and mouse. Next time buy a logitech top-of-the-line set and you will not have this kind of trouble. I no longer have trouble with my 6000 desktop set, though, just in case you are wondering. I use the Logitech set on my newer computer and the 6000 on the XP .
Hope this helps.
Brock