We’ve come to expect certain things from Windows, especially in the installed games department. So if you’re running Windows 7, and notice that the usual game roster (Freecell, Solitaire, Hearts, etc) isn’t available, then this tip is just for you!
Click Start>Control Panel and click Programs. Under Programs and Features, click Turn Windows features on or off.
In the resulting window, click the plus sign next to Games. Now all you have to do is put a tick mark next to the games you want enabled in Windows and hit OK.