If what you bought was a custom image, who knows what is on there. You can do a factory reset and select the option to 'Remove Everything', which would start you from scratch.
Have you checked to see if the activation key is valid? That is something else worth investigating.
I have used the key for the last 3 years it worked when putting it in and it is enterprise edition, I have had no issues but just anxious about my privacy that’s all