Hi ,
Please let us know which game are you trying to load?
Check if the game is compatible with Windows 7 or not:
http://www.microsoft.com/windows/compatibility/windows-7/en-us/Default.aspx?type=Software
Try to run the game in Vista compatibility mode and check.
Most programs written for Windows Vista also work in this version of Windows, but some older programs might run poorly or not at all. If a program written for an earlier version of Windows doesn't run correctly, you can try changing the compatibility settings for the program, either manually or by using the Program Compatibility troubleshooter.
1. Open the Program Compatibility troubleshooter by clicking the Start button , and then clicking Control Panel. In the search box, type troubleshooter, and then click Troubleshooting. Under Programs, click Run programs made for previous versions of Windows.
2. Follow the instructions in the troubleshooter.
For more information refer the below link:
http://windows.microsoft.com/en-US/windows7/Make-older-programs-run-in-th is-version-of-Windows
Also take a look at the following link which talks about the similar issue:
Regards,
Savan – Microsoft Support.