The most common error when editing the hosts file. : Notepad (or your text editor) was not launched with administrator privileges. Solution : Completely close your text editor, then right-click its icon and select "Run as administrator" before opening and editing the hosts file again.
Navigate to the following directory path: C:\Windows\System32\drivers\etc
SolidWorks installation errors often trace back to a modified Windows hosts file. System administrators or security software frequently block specific domains to manage network traffic or software validation. When these blocks intersect with SolidWorks activation servers, the installer fails.
You should see replies from 127.0.0.1 or a "General failure" message. If you see an external IP address, the hosts file is not being respected (check for typos or group policy overrides).
The Windows hosts file remains a powerful, lightweight tool for controlling name resolution. For those who need to temporarily block telemetry or diagnostic calls for a legitimate, licensed version of the software, editing the hosts file is a fast and effective technical solution. However, its effectiveness has limitations, especially against modern applications that rely less on DNS resolution.
If you are trying to a connection to a specific internal license server (rather than blocking external activation), you can add the server's IP address instead: 192.168.1.50 servername #Example Local License Server Use code with caution. Important Considerations and Risks
Follow these steps to edit your hosts file. You must have Administrator privileges. Step 1: Open Notepad as Administrator Click Start and type Notepad .
SolidWorks Host File Block Install: A Guide to Troubleshooting and Proper Licensing
Antivirus programs, including Windows Defender, are designed to protect your system and often flag the modified files and keygens used in "offline" or network-blocked setups as potential threats.