Spend too much time on the computer will affect learning

Windows 7 parental control to use computer

We often like to play games online, I have to implement the mandatory measures to prevent this from happen.
1. Not to play games online
Tit's very simple if you don't want to play online games. You just need to click the "Start / Run", type "gpedit.msc" and then make sure. Then open the "Group Policy" window on the left and  double-click the "Do not run specified Windows applications" in "Administrative Templates / System". And click "enabled" of "Settings" tabcard, click the "Show" pop-up "Display Properties" window, click the "Add / input", type the program name of the game, click "OK" button.
2. The computer system time limit
Spend too much time on the computer will affect learning, how to control the usage time of computer?
You can do this by using a "parental control" feature comes with Windows Vista / 7 system. First, you should enter to the administrator user, open the "Control Panel", double-click "User Accounts and Family Safety". And then select the account which you need to use frequently in the feature and click "time limit". It will Pop-up "time limit" window, click using computer's date and time on the grid. The system will automatically exit if we entry to the disabled period.