It seems like you are encountering an issue with opening .mpp files in Microsoft Project 2010 on Windows 7. Here's a step-by-step guide to help you associate .mpp files with Microsoft Project 2010: 1. Check Installation Path: Make sure that Microsoft Project 2010 is correctly installed on your system. If it's installed, take note of the installation path where the executable file is located. 2. Associate .mpp Files: - Right-click on any .mpp file. - Choose "Open with" and then "Choose default program." - In the dialog that appears, select Microsoft Project 2010. If you do not see it in the list, click on "Browse." - Navigate to the installation directory of Microsoft Project 2010 and select the executable file (usually...