Thanks again for all the thoughts.
I don't have to do anything special - it works like a standard router/modem combination.
Chrome I haven't tried, haven't even installed.
I'll try the suggestions, if nothing works, I give up. Heartbroken.

By the way, IObit Uninstaller got stuck trying to uninstall Opera, twice. First when it used standard Opera Uninstaller to uninstall, which gets stuck halfway through the process of uninstalling. Then, after forced comp restart, IObit sees there is some code left but it freezes (becomes totally unresponsive to any action). After 24 hours I rebooted the comp and now IObit does not report any left-overs from Opera.

Some answers: I do have Norton Internet Security, but disabled this to see if it was the cause of the problem. It was not.

Then: I connect to the internet via LAN and "Mobile network modem" (no landline phone available where I am). This is slow but works with all other programs which I use (Internet explorer, mail, and so forth).

Finally, I tried IObit uninstaller, which took ages to uninstall Opera Stable, then froze. Restarted it with Powerful scan, after more than 12 hours still working - nor reacting to any input. After restart of computer, reinstalled Opera, same result, Opera cannot find my internet connection (while all other programs can, I am writing this on MS Edge )
I don't use proxy settings.

Any other thoughts? Please?
Thanks for all your ideas, even if the problem still exists.

PS: have IObit uninstaller running again, it seems to be making better progress this time around. Will report on the results.

Thank you, I tried that too. No luck.
But thanks for your input nevertheless.

I tried without firewall, this did not solve the problem.
I tried with and without turbo and vpn
both made no difference
I tried with restarting in between attempts. that did not solve the problem

Hi, just new to opera, and very disappointed. Version 43.0
Opera cannot connect to the internet, it comes back with "there is no internet connection" even though all other programs (internet explorer, mail programs etcetera) have no problem.
Turning off firewall has no effect.
Running Windows 10 pro 64bit.
Reinstalled from fresh download, still the same problem.
Is this a known issue? Help, anybody?
Thanks