Andy, It's great to hear that you're enjoying Windows 7! The issue you're facing with your Microsoft IntelliMouse Explorer 3.0 USB mouse could be related to compatibility or driver issues. Here are a few steps you can take to try resolving the problem: 1. Driver Update: - Although you mentioned that the newest driver available is from 2006, it's still worth checking the Microsoft website or the manufacturer's website to see if there are any updates for your specific mouse model. - Sometimes, even if the driver is old, reinstalling it can resolve certain issues. You can try uninstalling the current driver completely and then reinstalling it. 2. Compatibility Mode: - You can try running the mouse driver installer in...