Before launching the SolidWorks installer, test that the domains resolve to 127.0.0.1:
ping activation.solidworks.com
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). solidworks host file block install
Cause: You accidentally blocked *.solidworks.com globally, but some unrelated sites use subdomains of solidworks.com (e.g., forum.solidworks.com).
Fix: Only block the specific lic. and activation. subdomains listed above. Do not block www.solidworks.com if you want to use their knowledge base. Before launching the SolidWorks installer, test that the
The "block" refers to redirecting these specific domain names back to your own computer (127.0.0.1 or 0.0.0.0). By doing a SolidWorks host file block install, you prevent the software from verifying the license status externally. You should see replies from 127
Crucial Disclaimer: This article assumes you are using a legitimately purchased license. Blocking outbound calls is legal for privacy and stability when you have a perpetual license key. This guide does not condone software piracy. Using these methods to crack software is illegal and dangerous.
Before you hit save on that hosts file, consider the risks.