Solidworks Host File Block Install [new] [2026 Release]

: Save the file. Then, open Command Prompt and type ipconfig /flushdns to apply the changes immediately. 🛰 Network Licensing Tip

For more detailed technical walkthroughs, you can refer to resources from GoEngineer Javelin Technologies troubleshooting a specific error message you're seeing during the SOLIDWORKS install?

Installing SolidWorks should be straightforward, but sometimes security settings or network glitches can bring your progress to a halt. One common culprit is your computer’s , which may be blocking the installer from reaching critical activation servers or local network repositories. Why the Hosts File Matters

Modifying the hosts file requires administrative privileges and can affect network connectivity for the applications listed. Proceed with caution. 1. Open Notepad as Administrator solidworks host file block install

: Add a new line at the bottom of the file following this format: [Server IP Address] [Server Hostname] 192.168.1.50 MyPDMVaultServer : Save the file and close Notepad. GoEngineer Other Common Installation Blocks If you are seeing a blank white screen

Older versions of SolidWorks (2015–2019) have known bugs where they lose license validation after a Windows Update. Blocking the host files prevents Windows from forcing a re-validation that will fail.

You didn't run Notepad as administrator. Fix: Close Notepad. Re-open via Right-Click > Run as Admin. Repeat the process. : Save the file

Outdated root certificates in older Windows builds can prevent your system from establishing secure handshakes with modern SolidWorks authentication servers.

SolidWorks is the gold standard for 3D CAD design, used by millions of engineers and designers worldwide. However, one of the most common pain points for IT administrators and power users is managing the software’s constant attempts to "phone home." Whether you are running a legitimate standalone license, managing a network license server, or troubleshooting a failed installation, you have likely encountered the term: .

If you suspect your hosts file is causing issues, follow these steps to clean it up or add necessary workarounds: Proceed with caution

When you launch the SolidWorks Installation Manager, the software attempts to ping specific activation and validation servers. If your hosts file maps these server addresses to 127.0.0.1 (localhost) or 0.0.0.0 , the traffic is dropped. The installation immediately fails, often displaying generic connection errors or licensing validation timeouts. Why SolidWorks Domains Get Blocked

Modifying system files to bypass software licensing is a violation of the SOLIDWORKS Terms of Use. This information is provided for educational and troubleshooting purposes regarding network configuration only.

If an entry in this file directs a SOLIDWORKS validation server to an incorrect IP address (such as 127.0.0.1 ), the installation manager cannot verify your serial numbers or licenses, resulting in immediate installation failure. Why Blocks Occur

: Uncheck "Prevent any program from modifying the HOSTs file". : Go to Advanced Settings and uncheck "Lock Hosts File". Check File Attributes : Ensure the hosts file itself is not set to "Read-only". Navigate to C:\Windows\System32\drivers\etc Right-click the file and select Properties Run as Administrator