Windows 7 does not allow to run all the programs, software at PC. There are compatibility issues. But still you can run any program / software at Windows 7 regardless of compatibility issues. Whether the software is compatible with Windows 98, Windows XP, Windows XP (SP2), Windows XP (SP3), Windows Vista – it will run at Windows 7. This is where Windows XP compatibility mode comes in handy. And its a built-in feature in Windows 7. You can choose to run any program under its compatibility mode according to Windows version requirement.