Every month or so, when I open a blank page in Google Chrome, I see my account name at top right hand corner of the page - as expected. OK.

When I click on my account 'name', it will state: First User (that's me). Alright! But then, just under it, there appears a 2nd User !! Total stranger, whom I have no idea who they are ??

My PC use is limited to my home, and I have no local network so to speak, so others can intrude in. Just me alone in my home. With couple of staff - house cleaner, and a cook. No others.

Where do those users come from?

How can they invade my Google Chrome, and add an account?

What's the procedure to block any further users, and restrict my system and chrome to only me!

Thanks.
Thank Watch! But I know that no one else in this house used it. Cause, when I checked Windows Log, viewer, showed (time wise) that no one else used the system/PC except me!