Question: How to block or unblock websites without software?

Answer: Do the following:

 For example, you want to block www.xyz.com!

 * Open the folder C:\WINDOWS\system32\drivers\etc

 * There you will find a file named HOSTS

 * Click on the file and press SHIFT and now right click on it.

 * From the right click menu select Open with.

 * Now, select Notepad to open the file from the list!

 * Now, in the file under the line 127.0.0.1 local host add another line as 127.0.0.2 www.xyz.com.

 * Now, File >> Save !

 Now, open your web browser and try opening www.xyz.com, it will not load!

 To unblock sites just do the opposite!