Hello, I purchased a chrome book off of craigslist. I found that it was a managed device ive tried several ways of rebooting , power wash, esc, refresh, power even reinstalling the operating system, but didn't get any accurate results. Is there a way I can go inside the chromebook and reset it from there? It's kinda useless as a home laptop if I can't do anything on it. The model is a Dell chromebook 11

Any tricks to return it to factory ??