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Click the Windows logo in the bottom-left corner of the screen. This will search your computer for the Notepad app. Right-click Notepad at the top of the Start window, click Run as administrator in the drop-down menu, and click Yes when prompted. The Notepad window will open.  If your mouse doesn't have a right-click button, click the right side of the mouse, or use two fingers to click the mouse. If your computer uses a trackpad instead of a mouse, use two fingers to tap the trackpad or press the bottom-right side of the trackpad. It's in the top-left corner of the window. A drop-down menu will appear. This option is near the top of the File drop-down menu. Doing so opens a File Explorer window. To do so:  Click This PC on the left side of the File Explorer window. Scroll down and double-click your hard drive's name (usually OS (C:)) in the middle of the window. Double-click the "Windows" folder. Scroll down and double-click the "System32" folder. Scroll down and double-click the "drivers" folder. Double-click the "etc" folder. It's in the lower-right side of the window. A drop-down menu will appear. This option is in the drop-down menu. You should see several files appear in the main window. Find the "hosts" file in the main Notepad window, then do the following:  Right-click the "hosts" file. Click Properties in the drop-down menu. Click the Security tab. Click Edit. Check the "Full Control" box. Click OK, then click Yes when prompted. Click OK. Click the "hosts" file to do so. It's in the lower-right side of the window. The "hosts" file will open in Notepad. Click the very end of the last line on the page, then press ↵ Enter. To block a website in your computer's browsers, do the following:  Type in 127.0.0.1 and press Tab ↹. Type in a website's address without the "www" section (e.g., "facebook.com", "twitter.com"). Press ↵ Enter to start a new line, then repeat the above two steps with other addresses you want to block. While you can block sites in most browsers using the above step, Google Chrome is slightly different: if you're blocking sites on Google Chrome, you'll need to place a space and then the "www.[site].com" version of the website's address after the "[site].com" version.  To block Facebook, for example, you would type in 127.0.0.1	facebook.com www.facebook.com. Adding the "http://" or "https://" part of the address as well (e.g., 127.0.0.1	facebook.com https://www.facebook.com can improve the chances of the site being blocked. IP address — You can find a website's IP address and then block it in the "hosts" file to prevent people from accessing the website via its IP address.  Mobile site — By placing "m." in front of a website's address (e.g., "m.facebook.com" instead of "facebook.com"), you can block the mobile version of the website as well. To do so:  Click File in the top-left corner of Notepad. Click Save As... in the drop-down menu. Click the "Save as type" drop-down box, then click All Files in the drop-down menu. Click the "hosts" file in the main window to select it. Click Save, then click Yes when prompted. . You'll use Command Prompt to perform this action. Flushing the DNS cache will prevent saved browser information from clashing with your blocked sites. If you have any browser windows open, close them and then re-open them. Any websites you added to the "hosts" file should now be blocked in your browsers. If the websites still aren't blocked after restarting your browsers, try restarting your computer.

Summary:
Open Start . Type in notepad. Open Notepad in administrator mode. Click File. Click Open…. Navigate to the "etc" folder. Click the "Text Documents (*.txt)" box. Click All Files. Remove security from the "hosts" file. Select the "hosts" file. Click Open. Create a new line at the bottom of the document. Add websites to the block list. Block Google Chrome sites using this method. Try blocking alternative versions of the website's address. Replace the existing "hosts" file with the edited one. Flush your computer's DNS cache Restart all browsers.