After upgrading Sygate Enforcement Agent or Sygate Protection Agent to Symantec Endpoint Protection, and then uninstalling Symantec Endpoint Protection, Symantec Auto-Upgrade Agent is not removed.
To manually remove the "Symantec Auto-upgrade Agent" service fron the service control manager
Locate and highlight the following key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_SMCINST
Click Edit > Permissions.
Select the Everyone group, click Full Control, and then click OK.
Delete the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_SMCINST key.
Locate and delete the following key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Smcinst
Restart the computer.
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