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How to Troubleshoot DNS and DNS Cache Issues in Windows

Issue Description 

Websites may fail to load or resolve due to DNS problems. 

Common Causes 

  • Corrupt DNS cache 
  • Incorrect DNS settings 
  • ISP DNS outages 

Step-by-Step Solution 

Step 1: Flush DNS Cache 

  • Open Command Prompt (Admin) 
  • Run: 

ipconfig /flushdns 

 

Step 2: Reset Network Configuration 

Run: 

ipconfig /release 

ipconfig /renew 

 

Step 3: Change DNS Servers 

  • Open Network adapter settings 
  • Set DNS to 8.8.8.8 / 8.8.4.4 

 

Step 4: Restart Network Adapter 

  • Disable and re-enable the adapter 

Explore Further 

  • Restart router 
  • Test alternate DNS providers 

Prevention & Best Practices 

Use reliable DNS providers.