Clear the DNS Cache
Open a Command Prompt window as Administrator. To do so, open the Start menu, type “Command Prompt” into the search box, right-click the Command Prompt shortcut in the results, and then select the “Run as Administrator” command.
At the prompt, type the following command, and then press Enter:
ipconfig /flushdns
This command works on all versions of Windows, including Windows 10, 8, 7, Vista, and XP.
Running this command should usually fix whatever problem you have. However, some applications may have their own DNS cache you need to clear if you’re still experiencing problems. For example, Firefox has its own internal DNS cache, so you may want to close and reopen it—or even clear its browser settings—if you’re experiencing problems in Firefox.
Restart the DNS Service
On older versions of Windows, you may also want to try restarting the DNS Client system service that handles the DNS caching. This isn’t possible on Windows 10 and 8, which prevents you from stopping and starting this service—you’ll just see an error message if you try. However, you can do this on Windows 7, Vista, and XP.
If you’re using an older version of Windows, you can do this right from the Administrator Command Prompt window you already have open. Just run the following commands in turn:
net stop dnscache net start dnscache
If you’re having problems and feel the need to restart this service on Windows 10, you can always try rebooting your computer. This restarts the DNS Client service and every other piece of software on your computer.
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