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If you are working within a corporate environment, your company's network firewall or proxy server may be blocking outbound traffic to the SolidWorks activation nodes. Contact your IT department to whitelist *.solidworks.com .
Change the file type filter (bottom right) from "Text Documents ( .txt)" to **"All Files ( .*)"**. Select the file named hosts and click . 3. Add the Block Entries
Install SolidWorks inside a VM that has no virtual network adapter. solidworks host file block install
: Modern Windows versions require administrative privileges to modify files in the directory. SOLIDWORKS Forums 2. Common Symptoms "Permission Denied" Error : Explicit error messages stating C:\Windows\system32\drivers\etc\hosts permission denied during the 3DEXPERIENCE Launcher setup. Blank Installation Manager
SolidWorks, like most modern professional software, includes built-in telemetry, license validation, and update-checking routines. During a standard installation, the SolidWorks Installation Manager (SWIM) attempts to connect to various servers owned by Dassault Systèmes. These connections serve several legitimate purposes:
If you find that the Hosts file approach is not adequately blocking application-level telemetry or if you are dealing with a heavily restricted network environment where Hosts files are automatically overwritten by group policies, configuring your is a robust alternative. This public link is valid for 7 days
Open Command Prompt as Administrator and type: ipconfig /flushdns . Risks and Side Effects of Blocking SolidWorks Servers
"You shall not... attempt to circumvent the technical limitations of the Software."
A full restart is not always required. The quickest way to apply your changes is to open the Command Prompt as an administrator and run the command ipconfig /flushdns . This clears the DNS cache and forces your system to read the updated Hosts file. Can’t copy the link right now
Blocking specific host addresses is a common method for troubleshooting network licensing issues or preventing unwanted communication during a SOLIDWORKS installation. This is typically done by editing the Windows hosts file to redirect hostnames to a non-existent or local IP address.
Double-click the file named (it will not have a file extension). Step 3: Identify and Remove SolidWorks Blocks
Change the file type dropdown menu from Text Documents (*.txt) to . Select the hosts file and click Open . Step 3: Identify and Remove SOLIDWORKS Blocks
: If the IP address of your license server changes, the hardcoded entry in the hosts file will prevent SOLIDWORKS from launching until the file is manually updated.