How Windows VISTA/7 system controls how long to use

Online games will not let play
To want to do not play online, very simple. Click "Start/Run", enter "Gpedit.msc" and OK, open the Group Policy window, select Administrative Templates/System on the left, double-click do not run specified Windows application, click "Enabled" On the Settings tab, and click "Show" to eject the "Show content" window and click Add/Enter, enter the name of the game's program, and click OK.
Computer system time limit
Spend too much time on the computer, affect learning, how to control the use of computer time?
This can be done using the Parental Controls feature that is brought by the Windows VISTA/7 system. Enter the administrator user, open Control Panel, and double-click User account and home security. Select the account you want to use later, and then click Time limit. pops up the time limit window and clicks the date and time the computer was used on the grid. If you enter a disabling period later, the system will automatically exit.