This article explains how to flush and clear the Windows DNS cache, including methods that use the Run dialog box, Command Prompt, and Windows PowerShell. If you're not sure which to use, start with the Run dialog box method.
The easiest way to clear your DNS cache is to use the Run dialog box, a Windows utility that lets you quickly execute commands, launch apps, and open files if you know what to type.
Press and hold the Windows key + R to open the Run dialog box.
Type ipconfig /flushdns in the text field and click OK.