The process for editing the Hosts file is the same whether you're doing it for a legitimate network fix or for license blocking.

Do not rely on host file blocking for license circumvention. Use it only in controlled, legitimate scenarios (e.g., stopping crash reports from leaving an air-gapped engineering PC).

By default, Notepad only looks for .txt files. In the bottom right corner of the Open dialog box, change the dropdown menu from to All Files ( . ) .

Attempting to bypass online activation for pirated versions.

A blocked line typically looks like this: 127.0.0.1 ://solidworks.com

To resolve the block, you must inspect the hosts file and remove any lines restricting SolidWorks. Because it is a protected system file, you need administrative privileges to edit it. Step 1: Open Notepad as an Administrator Click the Windows menu. Type Notepad into the search bar. Right-click on Notepad and select Run as administrator . Step 2: Locate the Hosts File In Notepad, click File > Open .

Aggressive antivirus heuristic engines occasionally flag genuine SolidWorks licensing traffic as suspicious behavior. To prevent this, add the primary SolidWorks installation directory (typically C:\Program Files\SolidWorks Corp ) and the SolidWorks licensing executable paths to your antivirus exception/whitelist zone. If you want to troubleshoot further, tell me: What or code is SolidWorks showing?

| Limitation | Explanation | |------------|-------------| | | SolidWorks can use hardcoded IPs or DNS-over-HTTPS. | | Breaks legitimate functions | Online help, toolbox updates, 3D ContentCentral, and network licensing will fail. | | False security | Gives admin a false sense that all phoning home is blocked (many apps ignore hosts file). | | Legal risk | If blocking is used to avoid paying for licenses, it violates copyright law (DMCA, EUCD). | | Detection | Modern SolidWorks versions may detect hosts file tampering and disable features / show non-compliance warnings. |

⚠️ Dassault Systèmes changes domains and uses IP rotation. Host file blocking is never fully reliable long-term.

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