IPCONFIG /FLUSHDNS | Fix Internet & DNS Issues Using CMD (Windows) In this useful Windows Command Prompt tutorial, you will learn how to use the powerful command ipconfig /flushdns to clear and reset the DNS cache on your Windows system. DNS cache stores previously visited website IP addresses. Sometimes this cache becomes outdated or corrupted, which can cause website loading errors, internet issues, or access problems. Flushing the DNS cache forces Windows to fetch fresh DNS information and he