Type ipconfig /flushdns and press to force Windows to recognize the new entry. Common Troubleshooting Scenarios
Ironically, you might need to block SolidWorks in your HOSTS file even with a legitimate license—though for different reasons. Solidworks Host File Block
Open the file: C:\Windows\System32\drivers\etc\hosts Type ipconfig /flushdns and press to force Windows
Dassault now uses SSL certificates. Even if you redirect licenses.solidworks.com to 127.0.0.1 , the software checks the SSL certificate. If it receives a localhost certificate (or none), it immediately flags the license as revoked. Solidworks Host File Block