Hi @Muzikguy911
A warm welcome here at the Roku Community!
We appreciate you raising your concern with us. We're here to assist you with this.
There is only one way to fix your issue, which is to perform a factory reset. It will completely delete the data from the previous owner.
Here's our Support link for further details and assistance: How do I factory reset my Roku streaming device?
Let us know if you need further clarification and assistance, and we'd be more than happy to continue doing so.
All the best,
Carly
Carly Y.
Roku Community Moderator