Most programs written for Windows Vista also work in Windows 7, 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.
To run the Program Compatibility troubleshooter:
1. Click the Start button, and then click Control Panel.
2. In the search box, type troubleshooter, and then click Troubleshooting.
3. Under Programs, click Run programs made for previous versions of Windows.
4. Follow the instructions in the troubleshooter.
If you can’t install a program, insert the installation disc for the program and, using the troubleshooter, browse to the program's setup file, usually called Setup.exe, Install.exe, or something similar. The troubleshooter is not designed to work on programs that have an .msi file name extension.