When attempting to uninstall Symantec Endpoint Encryption, the following error is observed:
Error:Disk is still Encrypted. Uninstall aborted
In order to uninstall the Symantec Endpoint Encryption client, first decrypt the drive.
Upgrade to Symantec Endpoint Encryption 11.3.1 or above.
If you have already tried the above two recommendations, please reach out to Symantec Encryption Support for further assistance.