Click Start on task bar
Click the Control Panel link in second column
Double click Add or Remove Programs or Windows Components
Click Add/Remove Windows components in left pane
Click Accessories and Utilities
Remove check mark on Games
Click OK buttons until Add/Remove Components window closes
Procedure is more likely to have permanent results if employee doesn't
have the ability to log in with administrative privileges. If that
ability cannot be avoided, you may need to motivate employee(s) with
prospect of disciplinary action as a consequence of future play.