How to Use Windows Host Files to Block Access to Website(s)

==> First launch run command on your computer. This can be done by pressing Win+R key on your keyboard
==> Now type the code below into the run command box and press enter and then Notepad will show some information

C://windows\system32\drivers\etc\hosts

==> Now go to the last line and add the website you want to block using the format below.
For example, if I want to block access to Facebook and Twitter on my PC, I add this code to the end of the Windows Host Files

127.0.0.1 www.facebook.com
127.0.0.1 www.twitter.com

Now save and exit the file.

If you later want to unblock the website, follow the same process as explained above and delete the line of code you entered.