Solidworks Host File Block Fix Jun 2026

Because the hosts file is a system file, standard user permissions will not allow you to save changes to it. Click the Windows menu. Type Notepad into the search bar. Right-click on Notepad in the search results. Select Run as administrator . Click Yes if the User Account Control (UAC) prompt appears. Step 2: Locate the Hosts File In Notepad, click File in the top menu and select Open .

The SolidWorks host file block fix is a solution to resolve issues related to SolidWorks being blocked by the Windows host file. This report provides a step-by-step guide on how to fix the issue.

: Slow response times when checking files in or out of a PDM vault.

: Search for Notepad in the Start Menu, right-click it, and select Run as Administrator .

After editing the hosts file, you need to tell Windows to update its DNS settings. Open the Start Menu, type cmd . Right-click and select Run as administrator . Type: ipconfig /flushdns Press Enter . Alternative Solutions (If Host File Was Clear) solidworks host file block fix

To fix connection issues, you may need to ensure your hosts file is not blocking the necessary SolidWorks communication, or alternatively, properly map your local server IP. 1. Navigate to the Hosts File

If the host file fix did not resolve your issue, consider these alternative solutions:

Look at the bottom of the file. Standard Windows installations usually end with descriptive comment lines starting with # . Scenario A: Removing Accidental Blocks

Windows stores a local cache of recent DNS lookups. To ensure your computer immediately drops the old blocked routes and fetches the true IP addresses for SolidWorks, you must clear this cache. Because the hosts file is a system file,

If you are unsure which lines to delete, you can rename the current file and let Windows create a fresh one:

With these details, I can provide specific steps to get your CAD software running smoothly again. Share public link

Fixing a SolidWorks host file block requires locating the file, clearing out incorrect entries, and ensuring your firewall plays nice with the SolidWorks Licensing Service. Understanding the Host File Block

2. Verify Your Corporate SolidNetWork License (SNL) Settings Right-click on Notepad in the search results

If the Hosts file is clear but you still face blocks, your firewall may be preventing the connection.

Paste the following path into the address bar and press Enter: C:\Windows\System32\drivers\etc

Before modifying files, you need the exact IP address and server name of your licensing host.

To ensure your specific licensing issue is completely resolved, tell me:

How to Fix SolidWorks Activation and License Errors via the Hosts File

One highly effective, system-level solution is modifying the Windows Hosts file. This guide explains how the Windows Hosts file interacts with SolidWorks, how to use it to resolve licensing blockages, and how to safely implement the fix. Understanding the Windows Hosts File