With growing concern over the effect of online content on office productivity or young viewers, a number of homes and offices are implementing plans to block certain websites. YouTube, although the site also contains a wealth of high-quality and useful content, is one site often singled out for blocking, due to potentially inappropriate content. While a number of Web browser add-ons and software solutions can be used to block sites, the simplest and most cost-effective way to block a website on a Windows 8 machine is to edit the host file.
Make Host Files Editable
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Log into Windows 8 as an administrator and launch the Start Screen.
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Type "Windows Defender" into the search field and click on the application icon.
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Click on the "Settings" tab on the right and select Excluded Files and Locations from the menu on the left.
Video of the Day
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Click on the "Browse" button at the top and navigate to the C:\Windows\System32\Drivers\etc directory. If Windows is installed on a drive other than C:, find the directory on the drive where you installed Windows.
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Select the "hosts" file in the "Etc." folder and click on the "OK" button.
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Click on the "Add" button in the main Windows Defender screen to exclude the file from Windows Defender protection.
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Click on the "Save Changes" button and close Windows Defender.
Block YouTube
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Launch the Windows Start Screen and type "Notepad" into the search field.
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Right-click on the Notepad app and select "Run as Administrator" from the options on the bottom of the screen.
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Click on the "File" tab in Notepad and select Open.
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Navigate to and open the hosts file from the directory C:\Windows\System32\Drivers\etc.
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Scroll to the bottom of the document and type in "127.0.0.1 youtube.com" to block YouTube.
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Save the changes to the file and close Notepad.
