Solidworks Host File Block Install -

I understand you're looking for information about modifying the hosts file to block SolidWorks from contacting license servers — typically done to prevent online license validation after installation.

To resolve the "SOLIDWORKS host file block install" issue, follow these step-by-step solutions: solidworks host file block install

Primary Licensing & Validation Servers

127.0.0.1 activation.solidworks.com
127.0.0.1 license.solidworks.com
127.0.0.1 solidworks.com.akadns.net
127.0.0.1 register.solidworks.com
127.0.0.1 sw.activate.com
127.0.0.1 activate.solidworks.com
127.0.0.1 solidworks.licensing.com

0.0.0.0 install.solidworks.com
0.0.0.0 www.solidworks.com
0.0.0.0 api.solidworks.com

3. Preventing Accidental License Deactivation

If you frequently move between networks (Office ↔ Home), SolidWorks may see a different IP address and attempt to re-activate, sometimes failing and locking your license. A host block stabilizes the activation. I understand you're looking for information about modifying

4. Legacy Software Support

Older versions of SolidWorks (2015–2019) have known bugs where they lose license validation after a Windows Update. Blocking the host files prevents Windows from forcing a re-validation that will fail. solidworks host file block install

This guide is intended for educational and technical troubleshooting contexts. It explains a common method used to prevent SolidWorks from “phoning home” to validate licenses or check for updates during a specific installation workflow.

Close SolidWorks.
Open Services.msc (Run as admin).
Find "SolidWorks Licensing Service" and "FlexNet Licensing Service."
Stop both services.
Delete the folder: C:\ProgramData\FLEXnet (This is a hidden folder; type it manually into Explorer).
Restart the services and relaunch SolidWorks.

What happens when you block SolidWorks installation