I have read all over the internet that people have been having this problem for years. I thought perhaps a complete reformat and upgrade to 7 would fix it, but no. I've uninstalled and installed drivers, tweaked all setting within 'Mouse' and 'Device Manager'. I have a laptop that I have even disabled the trackpad on. My mouse is a simple Logitech optical usb mouse. WHAT is going on, and WHAT can I do to fix it?

Hello, update its driver and use the latest one. If the problem persists then contact its vendor Technical Support. This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. Microsoft Student Partner Microsoft Certified Professional Microsoft Certified Systems Administrator: Security Microsoft Certified Systems Engineer: Security Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Applications Infrastructure, Configuration

That’s seem the problem related with your mouse. You can change another mouse to determine if the mouse has broken. Regards, Leo Huang Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.