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The is a common but solvable problem. In most cases, it can be fixed by:

: Try running the activator in compatibility mode. Right-click on the activator, go to Properties, and then under the Compatibility tab, check "Run this program in compatibility mode for:" and select an appropriate version of Windows.

: Real-time protection often deletes critical activation DLLs from the extracted SSQ folder, leading to initialization failures.

Click on and ensure the status fields turn green.

Once the service is installed, you can proceed to activate the licenses.

: The activator requires elevated permissions to modify system registries and license files.

: Ensure that you're running the activator with administrative privileges. Right-click on the activator and select "Run as administrator."

Before diving into solutions, it's essential to understand what triggers this error:

Ensure that you're using the latest version of SolidWorks 2018 and any patches or service packs provided by Dassault Systèmes. Also, if you're using an activator from SSQ, check for any updates.

The FLEXnet folder stores license data that may become corrupted.