You should impede sites for school sifting, parental controls or quite a few reasons. Internet browsers have distinctive implicit controls for site separating, and security programming, for example, Norton or McAfee have their own alternatives. Obstructing can be accomplished from various perspectives, yet Windows Vista offers the most clear strategy for hindering all sites aside from one utilizing its User Controls include. if you want Antivirus for your system visit : mcafee.com/activate
Steps
Stage 1
Open the "Start" menu. Open the "Control Panel," trailed by "Client Accounts" and afterward "Parental Controls."
Stage 2
Select a client account that doesn't have Administrative advantages, or make another one by clicking "Make another client account."
Stage 3
Snap "Windows Vista Web Filter" under "Windows Settings."
Stage 4
Select "Square a few sites or substance," check the "Just permit sites which are on the permit list" box, and afterward click the "Alter the Allow and Block records" interface.
Stage 5
Enter the one site you need to permit in the "Site address" box and press "Permit."
Stage 6
Press 'alright" on each open window to order the changes.