Solidworks Host File Block Install |link|

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.

The Windows hosts file acts like a local phonebook, mapping hostnames to IP addresses before your computer even checks the internet. If this file contains incorrect entries or is locked by security software, the SolidWorks Installation Manager may fail to connect, leading to blank screens or "Installation Failed" errors. Step-by-Step: How to Unblock Your Install solidworks host file block install

⚠️ Important legal/technical warnings

  1. Do not use this to avoid buying a license.
  2. Blocking servers may break legitimate features (e.g., Toolbox updates, online help, license borrowing).
  3. Some SolidWorks versions will detect host file tampering and refuse to run.
  4. For network licenses, blocking the client from reaching the license manager will cause SolidWorks to fail immediately.

Cause: When installation media is downloaded as a ZIP, Windows Explorer may block specific HTML files during extraction for security. I understand you're looking for information about modifying

Instructions

  1. If your legitimate installation is being blocked, it may not be the hosts file at all. Common culprits include: CurrentWare How to Block Websites Using the Hosts File on Windows 10/11 Do not use this to avoid buying a license

    • Success (for offline use): The installer times out on each connection attempt and falls back to a manual or offline activation mode. You will need a valid activation code generated from another machine.
    • Failure (some versions): The installer throws an error like "Unable to connect to licensing server" and aborts. In this case, you may need to temporarily unblock one or two specific domains, complete the activation, then re-block.
    • Slow installation: Each blocked connection may take 20–30 seconds to time out, making the installation process significantly longer. Patience is required.

    Cons:

    Blocking SolidWorks Installation