: Delete these lines or add a # at the beginning of the line to comment them out. Save the file and restart SOLIDWORKS. 3. Check Firewall Outbound Rules
Before modifying files, you need the exact IP address and server name of your licensing host.
You double-click the icon. The splash screen appears. The loading bar gets stuck at 75%... and stays there forever. solidworks host file block fix
127.0.0.1 activation.solidworks.com 127.0.0.1 upgrade.solidworks.com 127.0.0.1 crashdump.solidworks.com 127.0.0.1 performance.solidworks.com 127.0.0.1 solidworks.licensing.3ds.com 127.0.0.1 license.3ds.com 127.0.0.1 dslic.solidworks.com
: The hosts file may be set to "Read-only" or requires administrative privileges to modify. : Delete these lines or add a #
SolidWorks relies on a licensing system that frequently communicates with validation servers. If your workstation cannot reach these servers, or if a corrupt local network configuration blocks the connection, the software will trigger validation errors, license expiration warnings, or refuse to launch entirely.
Because the Hosts file is a critical system component protected by Windows security, you cannot open and save it like a normal text document. You must use elevated administrative privileges. Follow these steps to safely clean the file. Step 1: Open Notepad as an Administrator Check Firewall Outbound Rules Before modifying files, you
Paste the path C:\Windows\System32\drivers\etc into the address bar.
Double-click the file named (it will not have a file extension). Step 3: Insert the Redirect Blocks
Save the file, restart your machine, and launch SolidWorks to verify that your connection block is cleared.