@leocg Both, and yes all other programs update normally.

It would be really, really nice if the latest version of Opera can fix https://forums.opera.com/topic/37582/bug-opera-won-t-check-for-updates-invalid-params-and-unable-to-prepare-update-checker-runtime/76?_=1606766168901

As an update to this thread, I recently downloaded Opera_57.0.3098.110_Setup_x64.exe just to see if the update function worked properly on an earlier version. It did.

I don't know which version hosed the update functionality but there is something different since at least Opera 57 because Opera 57 automatically updated me to the latest version...

And, of course, the latest version no longer does automatic updates and shows the greyed-out "Check for update" button.

Sigh...

@leocg Both, and yes all other programs update normally.

@leocg WiFi. But I just bypassed the router to another ISP. It didn't make a difference. I really need to understand what the errors "COM init failed" and "Unable to acquire locks!" (and, perhaps, "Unable to prepare update checker runtime") mean to troubleshoot as I'm feeling like I'm grasping at straws.

@zalex108 Just tried another ISP - same problem.

@zalex108 Yup, already had tried it. No change.

@leocg Assuming you're also using Windows 10 and it's current on all it's updates, then I'm completely at a loss where to go from here. No, no difference having a VPN on or off, nor running in a different location. The temp folder is cleared after every reboot so that's not it either. (sigh)

So the Opera devs never come around the forums for a bit of troubleshooting, eh?

@leocg No, I was just commenting that the following lines in the opera_autoupdate.log go away after changing the language:

[21836:25364:0124/080941.730:80190515:INFO:resource_l10n_handler.cc(101)] Language not in the available languages list: en-US
[21836:25364:0124/080941.730:80190515:INFO:resource_l10n_handler.cc(107)] Trying language from system preferred list: en-US
[21836:25364:0124/080941.730:80190515:INFO:resource_l10n_handler.cc(150)] Retrying after adjustments: en-US
[21836:25364:0124/080941.730:80190515:INFO:resource_l10n_handler.cc(107)] Trying language from system preferred list: en

And please remember these lines come from a just downloaded portable version. So I'm thinking there's at least something wrong there.

However, changing the language does not fix the "COM init failed" or "Unable to acquire locks!" problems. If I only knew what COM init failed meant, it would better help me discover the problem.

@nvmjustagirl Yes, the file is empty:

CTempoperaportable66.0.3515.44opera_autoupdate.download.lock

Edit:
When I delete the file and re-run the updater, the file is recreated empty/with zero bytes.

Interesting - when I switch to English (United Kingdom) as the language, the language errors go away in the opera_autoupdate.log:

[10972:5992:0124/121601.997:3001781:ERROR:autoupdate_checker.cc(374)] COM init failed
[10972:5992:0124/121601.997:3001781:ERROR:autoupdate_checker.cc(333)] Unable to acquire locks! Download: true, metric: true
[10972:5992:0124/121601.997:3001781:ERROR:autoupdate_checker.cc(137)] Unable to prepare update checker runtime.

This suggests, at minimum, there's a bug somewhere related to the default language. This can't be related to my local environment.