Can anyone advise on removing an annoying browser hijacker that doesn't get picked up by anti-virus software?

It appears as a search engine on Chrome: 'tfrsrch.com'. It always opens a new tab with the URL 'find-browseronline.com', which is a malvertising search engine.

I can't delete it as it's locked by making it be managed by the administrator even though I'm the only admin. I've tried all the antivirus software I can think of—Windows Defender, Malwarebytes, Kaspersky, etc.—but none detect anything. I've also tried deleting Chrome policies but got some error messages. This only appears to be on Chrome (which I've already reset) and not on Edge.

Is there anything to be done, or do I need to do a Windows reinstall?