I know this is old but I’m answering so this can be looked at. I purchased a new 4K device and have the same issue. When I look under settings>system>about, someone else email address appears. I actually googled the email address and it comes up as someone trying to spread awareness about a crime against a transgendered individual. How were they able to do this? Should I be concerned about my personal info? Please help.
When you first set up a new Roku you have to link it to a Roku account, identified by email address.
You can either link to an existing account using your email address, or you can create a new Roku account and link to that.
If, when you set up the new Roku, it did not send you through the linking process, it would mean that the unit the store sold you is one that been returned to the store by somebody had already set up and linked the Roku but who returned it to the store without clearing out his data.
To clear out the current linked account, perform a Factory Reset via Settings > System > Advanced system settings > Factory reset. After the reset you'll be setting the Roku up all over again from scratch as though it had just come out of the box, including linking it to your Roku account and logging back into any channels whose subscriptions require logins.
