How To Block Twitter In My Computer

if you have windows, there is an option under parent controls, there is an option called url filtering, just enter the keyword you want to block, in your case, just type the word 'twitter' in the box and hit save.

once you save your changes, no one will be able to go to twitter.com or any other website that has twitter on it.

if you need more help, go visit windows website:

http://windows.microsoft.com/en-us/windows7/help/videos/using-parental-controls

When Parental Controls blocks access to a game or program, a notification is displayed that the program has been blocked. Your child can click a link in the notification to request permission for access to that game or program. You can allow access by entering your account information.

To set up Parental Controls for your child, you'll need your own administrator user account. Before you get started, make sure each child that you want to set up Parental Controls for has a standard user account. Parental Controls can be applied only to standard user accounts. For more information about user accounts and setting them up