Solidworks Host File Block Install

The Windows Hosts file is a plain-text file that maps hostnames to IP addresses. It acts as a local "phone book" that the operating system consults before reaching out to external Domain Name System (DNS) servers. In the context of a SOLIDWORKS installation, this file can be used to:

or if security software prevent access to it. This often results in "Permission Denied" errors or connectivity issues where the installer cannot reach the required license or download servers. SOLIDWORKS Forums Troubleshooting Hosts File Blocks

If the installation was corrupted, use the Windows Control Panel to repair it: Go to . Select SOLIDWORKS , click Change , and select Repair . Conclusion solidworks host file block install

Note: You must change the file type filter in the bottom-right of the Open dialog from "Text Documents ( "All Files ( to see the hosts file.* Add Server Info

Right-click on in the results and select Run as administrator . 3. Open the Hosts File In Notepad, go to File > Open . Navigate to C:\Windows\System32\drivers\etc\ . The Windows Hosts file is a plain-text file

The Windows hosts file is a local text file that maps hostnames to IP addresses. Operating systems check this file before querying external Domain Name System (DNS) servers. If a SolidWorks activation or licensing domain is mapped to a loopback address (like 127.0.0.1 or ::1 ), the operating system redirects the traffic back to your own machine, completely blocking external communication. Why Do SolidWorks Domains Get Blocked?

When installing or updating SOLIDWORKS, especially in professional or educational environments, users occasionally encounter stubborn license activation failures. These errors often indicate that the SOLIDWORKS application cannot communicate with the SolidNetwork License (SNL) server or Dassault Systèmes' activation servers. This often results in "Permission Denied" errors or

Resolving SolidWorks Installation Failures Caused by Hosts File Blocks

Thank you for taking the time to thoroughly explore this technical topic. When choosing your path forward, please do so equipped with an understanding of both the technical methods and the important principles of responsible software use.

If the "SolidWorks host file block install" method does not solve your licensing issue, you may need to check your firewall settings, reinstall the SolidNetwork License Manager, or contact your IT department to ensure the necessary ports ( ) are open. If you'd like, I can: Show you how to check if a port is open (25734/25735). Provide instructions on reverting the hosts file changes . List the common firewall settings to check for SOLIDWORKS.

: While often caused by blocked HTML files from a zip extraction, a blank screen can also indicate the installer is stuck waiting for a connection that the hosts file is blocking. Connection Timeouts