Solidworks Host File Block Fix Better Site

Inside Notepad, click in the top menu and select Open (or press Ctrl + O ).

Temporarily disable your antivirus or Windows Firewall to see if they are blocking the traffic.

Standalone licenses must validate their serial numbers with Dassault Systèmes activation servers.

remove the lines starting with # (these are comments) or lines that look like 127.0.0.1 localhost . 4. Save and Exit Go to File > Save and close Notepad. Step 3: Clear DNS Cache solidworks host file block fix

Leftover data from older software installations disrupts current license checks. Role of the Windows Hosts File

Use the Help > Licenses > Activate... feature to refresh your license status. If you'd like, I can: Help you find the exact IP address of your license server. Provide steps to reinstall the FlexNet licensing service .

The "SolidWorks host file block fix" is a legacy method. In modern versions (SolidWorks 2022 SP5 and newer), Dassault introduced and staggered heartbeat checks . If you are using a legitimate Student or Commercial license, the Hosts file block will cause SolidWorks to enter "Grace Period" mode and eventually lock you out after 30 days. Inside Notepad, click in the top menu and

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

The Hosts file is buried deep within the Windows system directory. In Notepad, click in the top menu, then click Open .

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Are you using a serial number or a company network license (SNL) ?

The Windows operating system safeguards network configuration directories from unauthorized changes. Click the Windows . Type Notepad into the search bar. Right-click Notepad and choose Run as Administrator . Step 3: Navigate to the Drivers Directory Inside Notepad, click File > Open .