Solidworks Host File Block Install Official

Type ipconfig /flushdns and press to clear the local DNS cache. Alternative Solutions for Installation Failures

Some users attempt to block SolidWorks from reaching its official activation or update servers by redirecting those domain names to an invalid IP address, such as 127.0.0.1 (localhost) or 0.0.0.0 . This is sometimes used in unofficial installation guides to prevent the software from verifying license keys against Dassault Systèmes' databases.

This is the practical section. Follow these commands exactly. You will need on your Windows machine.

Open Command Prompt as Administrator and type: ipconfig /flushdns . Risks and Side Effects of Blocking SolidWorks Servers solidworks host file block install

If your installation still fails or acts unexpectedly, you may need to your installation or manage the hosts file permissions. Preventing Hosts File Alteration

: Some security software (e.g., ZoneAlarm, Webroot) specifically locks the hosts file to prevent unauthorized changes. You may need to disable "Lock Hosts File" in your antivirus settings.

Scroll to the bottom of the document. Standard Windows hosts files typically end with explanatory text preceded by # symbols. Type ipconfig /flushdns and press to clear the

Installing SolidWorks should be a straightforward process, but it often grinds to a halt due to hidden network conflicts. One of the most common, yet overlooked, culprits behind installation failures is a blocked Windows hosts file.

In Notepad, go to and navigate to: C:\Windows\System32\drivers\etc\

🛠️ Troubleshooting: SOLIDWORKS Installation Blocked by Hosts File This is the practical section

Windows hosts file entries mapping SOLIDWORKS domains to 127.0.0.1 can block license activation, requiring users to remove these lines and flush the DNS cache to resolve installation issues. If issues persist, verifying Windows Firewall ports 25734 and 25735, disabling antivirus protection, or utilizing the Product Activation Wizard for email activation can bypass further restrictions. Read the full guide at Logical Solutions logicalsolutions.in How to Install SOLIDWORKS - Logical Solutions

SolidWorks relies heavily on network communication for activation, licensing, and installation verification. When a system cannot connect to the official Dassault Systèmes servers, it frequently points to a modified Windows hosts file. System administrators or security software often modify this file to block outbound connections, which accidentally prevents SolidWorks from installing or updating properly.

The Windows hosts file is a plain text file that maps hostnames (like activate.solidworks.com ) to IP addresses. It takes precedence over DNS servers. By mapping a SOLIDWORKS server to an invalid IP address (like 127.0.0.1 or 0.0.0.0 ), you force the computer to block communication with that server.

This guide is for informational purposes only. Always comply with your software licensing agreement.