Registry Tweak

Information provided courtesy of http://www.esreality.com/?a=post&id=222946&flat=yes

Logitech MX acceleration fix:

Change the following settings in "HKEY_CURRENT_USER\Control Panel\Mouse":

->delete the string value "MouseSensitivity"

->set "MouseSpeed" to "0"

->set "MouseThreshold1" to "0"

->set "MouseThreshold2" to "0"

Change the following settings in "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LMouFlt2\Parameters\OpticalMouse11\0000"

->set "Acceleration" to "Off"

->set "MouseSpeedX" to "200"

->set "MouseSpeedY" to "200"

->set "Resolution" to "8"

Now you have 800dpi and no negative acceleration. Have fun.

If you are running the ps2 adapter like myself you would also want to edit:

"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LMouFlt2\Parameters\PS2\0000"

->set "Acceleration" to "Off"

->set "MouseSpeedX" to "200"

->set "MouseSpeedY" to "200"

->set "ChordDelay" to "Off"

If you are using a Logitech MX mouse open up the Logitech Mouseware software and click on the motion tab. If it is hooked up ps2 then at the bottom of the page there will be a advanced features box where you can change your refresh rate up to 200hz.