how to block websites on pc without any software like it dude

Go to

C:\Windows\System32\drivers\etc

you will see a file named HOSTS.
Open it with NOTEPAD.

Then search for the line 127.0.0.1 localhost

To block the website facebook.com for example, add this text under 127.0.0.1 localhost:

127.0.0.1 www.facebook.comYou can add as many sites as you want, but do not forget to prefix it with "127.0.0.1".

6. Save the file

Now Facebook will get blocked in all web browsers.