Are you working on a or a company-managed computer? Do you have administrator access to this device?
Restart Google Chrome. The extension will no longer be forced, allowing you to disable or remove it via standard Chrome settings. Method 3: Temporarily Disabling the Main Symantec Client
For users who do not have local administrative privileges or who are in a managed enterprise environment, the most reliable and recommended method is to have an administrator disable the browser extension policy within the SEP client itself. This ensures the change is persistent and does not cause the SEP client to malfunction.