How to remove com.symantec.ms.systemextension?

bootyboi wrote:

This still shows up in my CPU

Search the developers web site for the official in-app uninstaller... this may require re-downloading the app to officially uninstall the app— look for the readme file or uninstaller in the pkg.

or ref

Uninstalling Symantec on a Mac - Division of Information ...

Please run Etrecheck and post its full report here. Use the "additional text" button and paste the report into the text box.

From the information in the report we should be able to determine the exact location of this, and tell you how to remove it.