Solidsquad Error — 6 Windows 11 Fixed

While officially unsupported by SOLIDWORKS for older versions, the "Error 6" encountered during license activation on Windows 11—often associated with SolidSquad activators—is a known issue for users attempting to run legacy versions like 2017 or 2018 on the newer OS. Understanding Error 6: Access Violation

Error 6 often means the registry keys ( .reg files) provided by SolidSquad failed to inject into the Windows Registry. Go to your SolidSquad folder.

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Windows 11 might be blocking the local ports required for the license loopback.

Look at the bottom of the tab for a security warning. Check the Unblock box. Click Apply and OK . Summary Troubleshooting Checklist Expected Result Check Protection History Finds missing files. Restores deleted data. Set Folder Exclusions Stops future deletion. Antivirus ignores files. Merge .reg Files Updates system configuration. Correct license pathing. Start Services Runs background validation. Error 6 clears. If you want to completely clear this error, let me know: What specific CAD/CAM software are you trying to activate? This public link is valid for 7 days

Re-extract the activator files into the excluded folder and run it again. Method 3: Fix Registry Permissions Manually

If this works, you are done. If not, proceed to Method 2. Can’t copy the link right now

Wait for the command prompt to display Server started successfully . Press any key to close the window. Step 4: Configure Windows Firewall Rules

Ensure the value is set correctly, usually to 27000@localhost or 27000@127.0.0.1 . If it is missing, create a new one matching your software manual specifications. Pro Tips to Prevent Future Errors

during installation, as background updates can overwrite active registry changes.