It seems that John is an additional user profile on your Windows 10, likely created before your PC purchase. Below are steps on how you can address this issue and remove John's account from the initial login screen: Make sure you are logged into your administrator account in Windows 10 to make these changes.
Who is John. How to get rid of him - Microsoft Q&A
Hindustan Times on MSN: People are talking about John Ternus’ LinkedIn profile as he prepares to take over from Tim Cook as Apple CEO
John Ternus is set to become Apple's CEO, and Tim Cook will take up the role of Apple Executive Chairman.
People are talking about John Ternus’ LinkedIn profile as he prepares to take over from Tim Cook as Apple CEO
Moneycontrol: Apple's new CEO John Ternus's LinkedIn profile is viral. No bio, no posts, millions in views
John Ternus’s profile is sparse even by big‑tech standards. It lists just two roles: a brief stint as an engineer at Virtual Research Systems in the late 1990s, followed by more than 25 years at Apple ...
Apple's new CEO John Ternus's LinkedIn profile is viral. No bio, no posts, millions in views
Euronews on MSN: Here's what we know about John Ternus, Apple's new CEO
Low-profile but deeply embedded at Apple, incoming CEO John Ternus has spent nearly his entire career at the company. Here’s what we know about him. View on euronews ...
NDTV Profit on MSN: 'Look at his experience': John Ternus' LinkedIn profile goes viral as Tim Cook steps down as Apple CEO
John Ternus has the mind of an engineer, the soul of an innovator, and the heart to lead with integrity and with honor, said Tim Cook.