If your G5 plus and/or minus buttons stop responding, you will need to change your settings in the Logitech Mouse and Keyboard software (SetPoint). To change your settings, do the following:
Open SetPoint (Start > Programs > Logitech >Mouse and Keybaord > Mouse and Keyboard Settings).
Select the Game Settings tab (shown below):
Change the cursor acceleration settgins from SetPoint to OS implementation as shown below:
If the preceding instructions did not resolve the problem, you will need to contact Logitech technical support.
You will need your model number, part number and product ID. For instructions on finding this information and contacting support, consult Knowledge Base article 9964.