If you need to monitor your computer in Windows 7, such as applications, games, email, media and website-filtering, try parental controls without any third-party software.
How to Access/Enable the Parental Controls:
Click the Start button --> Control Panel(By All Items) --> the parental controls icon --> the Windows accounts list in the Parental Controls screen window --> Select an account --> In the user's parental control settings, check the "On, Enforce Current Settings" option --> cilck the OK button.
Now the chosen account is enabled the parental controls.
If you have kids needing to use PCs, you can setup windows 7 parental control for your kids account like :
1.Time Limits: Let kids to use computer in Saturday and Sunday.
2.Allow and Block specific Programs.
3.Games: Restrict kids not to play any games.