Best posts made by jonwatson

@burnout426 Thanks! I created a new user account and installed Opera. I had previously tried to uninstall and reinstall using my own account but that had failed.

In the new account I was able to browse successfully.
Returning to my own account I continue to have the same problem in Opera, DNS_PROBE_FINISHED_BAD_SECURE_CONFIG

@jonwatson I think the problem is related to DNS.
When "Use DNS-over-HTTPS instead of the system’s DNS settings" is OFF the error changes to: ERR_CONNECTION_RESET

@burnout426 Thanks for the ideas!

1. I tried clearing the host cache at the URL opera://net-internals/#dns but see no change.
2. I scanned my system with the free version of Malwarebytes and fortunately found no problems.
3. Trying a test standalone installation of Opera does not work because it has no web access and so is stuck on the "Downloading..." splash screen progress bar forever.