Solidworks Host File Block Install Jun 2026
Search the file for any lines containing "solidworks" or "activation".
Scroll to the very bottom of the file. You will see several lines starting with the # symbol, which indicates comments. You will add your block rules on a new blank line beneath these.
Sometimes antivirus or security software reverts changes to the hosts file. To prevent this: Right-click the hosts file > . Go to the Security tab.
Right-click the Windows menu and select Terminal (Admin) or Command Prompt (Admin) . solidworks host file block install
| Category | Domain Name | Purpose | | :--- | :--- | :--- | | | im.solidworks.com | Instant Messaging / Telemetry. This is the primary "phone-home" domain for usage data, error reporting, and feature usage analytics. It is one of the first domains to block to cut off the main channel of communication back to Dassault Systèmes. | | Diagnostics & Stability | crashdiag.solidworks.com | If SolidWorks unexpectedly crashes, this service is designed to receive the crash report. | | | performance.solidworks.com | Dedicated to transmitting performance metrics, such as start-up times and tool responsiveness, allowing Dassault to optimize the software. | | Certificate Validation | www.digicert.com | Digital certificates help verify the software's authenticity. Blocking these domains can prevent the software from checking if its license file is genuine. | | | ocsp.digicert.com | The Online Certificate Status Protocol (OCSP) domain for real-time certificate validation checks. | | | cacerts.digicert.com | The domain hosting the Certificate Authority (CA) bundle for verifying a chain of trust. | | | crl3.digicert.com / crl4.digicert.com | Certificate Revocation List (CRL) domains that check if a specific certificate has been revoked by the issuer before it was set to expire. |
Ensure the SolidWorks Installation Manager executable ( sldim.exe ) has explicit permission to bypass your firewall.
that might disrupt custom add-ins.
Which of SolidWorks are you trying to install?
127.0.0.1 activation.solidworks.com 127.0.0.1 license.solidworks.com 127.0.0.1 solidworks.com.akadns.net 127.0.0.1 register.solidworks.com 127.0.0.1 sw.activate.com 127.0.0.1 activate.solidworks.com 127.0.0.1 solidworks.licensing.com
Before starting, ensure you have completed the following pre-installation steps to maximize the chance of a successful and stable installation. Search the file for any lines containing "solidworks"
If you are unable to save, you did not open Notepad as an Administrator. 6. Flush DNS
where servers must communicate across different network domains via VPN.
Modifying the hosts file requires administrative privileges. Follow these steps carefully to ensure the hosts file is updated correctly. 1. Locate the Hosts File in Windows You will add your block rules on a