It seems you are encountering issues with both the 64-bit and 32-bit versions of MATLAB 2010 on your Windows 7 Professional x64 system. The symptoms you described, where MATLAB opens the logo screen and then closes, could be due to several reasons. Here are some troubleshooting steps and recommendations to help you identify and potentially resolve the issue: 1. Compatibility Mode: - Ensure that MATLAB is not running in compatibility mode. Right-click on the MATLAB executable, go to Properties, and check the Compatibility tab to ensure compatibility settings are not enabled. 2. Administrator Privileges: - Try running MATLAB as an administrator. Right-click on the MATLAB shortcut or executable and select "Run as administrator"...