Elias was a veteran designer, the kind who could navigate SolidWorks with his eyes closed. But tonight, the software was a ghost. Every time he tried to launch it, the splash screen would hang on "Verifying License," only to vanish into the digital ether without so much as an error message.
Temporarily disable the "Lock Hosts File" or "Prevent programs from modifying HOSTs" setting in your antivirus dashboard. Read-Only Attribute Right-click the file and select Properties is unchecked. Permission Fix Properties > Security , ensure your user account has Full Control Microsoft Learn 3. Fixing Blocked Installation Files
SolidWorks uses this file to communicate with the and PDM servers. When your computer searches for the license server, it first checks the Hosts file. If the file contains incorrect entries (e.g., redirecting the license server to 127.0.0.1 ), SolidWorks won't be able to find it, resulting in activation failures.
There are two primary reasons these blocks appear in a workstation's Hosts file: solidworks host file block fix
) has specific features that lock the hosts file to prevent hijacking.
If your network is functioning perfectly for web browsing but SolidWorks refuses to validate, check for these specific warning signs:
If the host file fix keeps failing (modern Windows sometimes ignores localhost redirection for certain apps), try: Elias was a veteran designer, the kind who
What do you see when the software fails?
Dassault Systèmes actively logs Hosts file tampering. In 2023, they updated the EULA to allow automatic scanning of the etc directory. If you are using a cracked version, the "SolidWorks Host File Block Fix" will not work long-term, because the software will detect the deletion of the crack lines and re-block itself or trigger a remote kill switch.
To bypass DNS translation issues and manually link an IP address to a server name, follow these steps: Open Notepad as Admin : Search for in the Start menu, right-click it, and select Run as Administrator Open the File : In Notepad, go to File > Open and navigate to: C:\Windows\System32\drivers\etc\ Change File Type : In the bottom-right corner of the "Open" window, change .txt documents to see the Add the Entry : Scroll to the very bottom and add a new line with the IP address Server Name 192.168.1.100 YourServerName Save and Flush : Save the file. Open a Command Prompt ipconfig /flushdns to force the system to recognize the change immediately. Hawk Ridge Systems ⚠️ Important: "Blocking" vs. "Unblocking" Unblocking (Legitimate Fix) Temporarily disable the "Lock Hosts File" or "Prevent
The Windows hosts file is a plain text file that maps hostnames to IP addresses. It is used to override DNS settings. Sometimes, security software, network policies, or previous installations of unauthorized software can add entries to this file that intentionally block access to specific websites—in this case, SolidWorks activation servers. When this happens, you might see errors like: "Cannot connect to the server" "License activation failed"
If your SolidWorks software suddenly refuses to launch or displays activation errors, a misconfigured Windows hosts file might be the culprit. SolidWorks relies on stable communication with licensing servers to validate your software. When this communication breaks down—often due to unintended blocks or leftover configurations from network migrations—the software fails to open.