There are commercially available softwares which will prevent access to websites you specify from your computer. But this can also be done on your computer without even spending a single penny. We will show you how to do it absolutely for free:
1. Browse to C:\Windows\System32\drivers\etc.
2. Look for a file named as hosts, then open it with Notepad.
3. At the bottom of the file, add the line as shown below:
127.0.0.1 www.blockingsite1.com
www.blocksites1.com is an example of website URL which you would like to block, just replace it with the actual URL so that they are unaccessible to all.
4. If you have more websites that would like to be blocked, just press Enter and repeat step 3 to add additional URL until all desired websites are added.
5. At the last line of the URL that you have entered, add an extra carriage return by pressing Enter.
6. Save and close the file.
Once you have completed above steps, all websites you have entered will be blocked with immediate effect. Hopefully this simple method will help you to prevent certain websites from being accessed by your kids or anybody else for any reason.