3D Pinball for Windows - Space Cadet (referred to as 3D Pinball or simply Pinball) is the version of the game bundled with various Microsoft products. It was originally packaged with Microsoft Plus! 95 and later included in Windows NT, Windows Me, Windows 2000 and Windows XP. Instructions are available from Microsoft on how to install it on Windows 98. Windows XP is the last version of Windows to include the game, as it was removed in Windows Vista since beta 1. However, by simply copying the whole "pinball" folder (usually in C:\Program Files\Windows NT\) from a Windows XP installation to another system it is possible to play the game on Windows Vista and Windows 7 in both 32 and 64-bit Environments.
if you have a xp installation cd, you can play the game after copying to win 7. make sure your windows are legal.