Extra Control Over Mouse Speed
If you want to tweak the settings for the three mouse-speed settings (MouseSpeed, MouseThreshold1, and MouseThreshold2), launch the registry editor and go to
Along with a few other settings, you'll see the three mouse-speed values in the right panel. Mouse-Speed is a multiplier that is set from 0 (always run at the basic speed) to 2 (multiply the calculated speed by 4). MouseThreshold1 indicates the number of pixels you must move the mouse between interrupts to automatically double the basic speed (unless MouseSpeed is not set to 0). By default, MouseThreshold1 ranges from 0 (do not introduce speed-doubling) to 10 pixels, but you can set its value to higher than 10 if you like. Setting the value closer to 1 makes Windows introduce speed-doubling sooner, which causes your pointer to pick up speed.
The last of the three pointer values, MouseThreshold2, behaves like MouseThreshold1 except that it causes Windows to again double the mouse's speed.