It seems like you are experiencing an issue with the window movement on Windows 7 RC1, where instead of the window moving smoothly with your mouse, you see a box moving. This could be related to graphic or display settings. Here are a few steps you can take to try and resolve this issue: 1. Update Graphics Drivers: Outdated graphics drivers can sometimes cause visual issues. Try updating your graphics drivers to the latest version compatible with Windows 7 RC1. 2. Adjust Visual Effects: You can try adjusting the visual effects settings in Windows to see if it resolves the issue. Here's how you can do it: - Right-click on "Computer" and select "Properties". - Click on "Advanced system settings" on the left. - Under the...