Solidworks Host File Block Install Access

Several factors can contribute to the host file blocking the SOLIDWORKS installation:

In corporate or managed enterprise environments, blocking policies are often handled at the hardware router or hardware firewall level rather than the local hosts file. If the local hosts file is clean but connections still fail, the network administrator may need to whitelist the following domains: ://solidworks.com ://solidworks.com ://solidworks.com Re-running the SolidWorks Installer

Verify that the command resolves to a public IP address rather than 127.0.0.1 or localhost . solidworks host file block install

: For modern cloud-connected versions, deleting the 3DEXPERIENCELauncher folder in C:\Programdata\DassaultSystemes\ and restarting can resolve stubborn installation hangs. 4. Summary Table of Resolutions Location/File Resolution Blank Install Screen \sldim\lang\english\HTML\frameset.html Right-click Properties -> Unblock Hosts Write Error C:\Windows\System32\drivers\etc\hosts Disable AV "Lock Hosts" setting; check Read-only status PDM Server Not Found C:\Windows\System32\drivers\etc\hosts Manually add [IP Address] [Server Name] Activation Blocked Windows Firewall Create Outbound Rule to "Allow connection"

How to Fix SolidWorks Installation Failures Caused by Hosts File Blocks Several factors can contribute to the host file

In the bottom-right corner of the Open dialog box, change the file type dropdown from to All Files ( . ) .

: Right-click hosts and open it with Notepad (ensure you run Notepad as an Administrator, or you won't be able to save). : Right-click hosts and open it with Notepad

If you are installing SolidWorks on a corporate laptop, a corporate VPN or strict proxy server might be routing traffic away from standard validation nodes. Disconnect from your VPN and try running the installation on a standard, unfiltered home network. Best Practices for a Smooth SolidWorks Installation

: Some antivirus programs (e.g., SentinelOne or ZoneAlarm) may lock or modify the hosts file to prevent unauthorized communication, inadvertently blocking legitimate SOLIDWORKS traffic. How to Fix a SOLIDWORKS Host File Block

If a computer previously hosted an unauthorized or pirated version of SolidWorks (or other CAD software), automated crack scripts frequently modify the hosts file to block activation checks. When you attempt to transition to a legitimate, licensed version, these old blocks remain and prevent the official Installation Manager from verifying the serial number.