Firewall? Antivirus?
Only Windows Defender. But as lepa wrote, I don't think this particular issue is caused by Firewall/Antivirus.
As of writing this, Chromium is once again working for me on MC 24.0.26 (Non Registered Version)
Yesterday I let the "Please Wait... Adding required components: Chromium" pop-up window remain on screen when I went to bed. This morning, seven hours later, it was still there. Had to be terminated through Task Manager. I re-tried it several times. I checked the Event Viewer but there was nothing there. I completely turned off Defender. Still the same results. The "Please Wait..." window would come up and never go away. Clicking Cancel on it did nothing.
I re-installed MC twice and re-imported my library but was met with the same results.
I decided to re-install once again and see how MC behaved
right after install, before importing my library and also to make a detailed list of every thing I did while trying to get this to work. Windows Defender is untouched, no other changes in Windows have been made.
Detailed list of me messing about:1. I run the MC 24.0.
20 install exe as administrator and after installation the program starts up. (This version was working with Chromium for me before I uninstalled it and later installed 24.0.26 instead, so I decided to try this earlier version. Just in case.)
2. On screen I am greeted by the "Welcome to JRiver..." message.
3. The first thing I do is to check 'Options/Tree & View/Web Browser/Engine'. It is set to Internet Explorer.
I change the Engine from IE to Chromium. I click OK. The "Welcome..." message seems to reload and is displayed again (all in all a 1 second process)
4. I click on a new tab. The "Please Wait... Adding required components: Chromium" pop-up
pop-ups and remains. Minutes pass. It remains on top of everything even if I switch to another program or desktop.
5. After a smoke and about 15 minutes of blank staring at the screen, a slight case of boredom overwhelm me, so I click Cancel on the "Please Wait..." window, and
to my surprise, it actually cancels and disappears (!). I have never seen this before. My heart skipped a beat.
6. On my screen now, the new tab that I previously clicked on is properly displayed, that is - I now have
two tabs both showing the "Welcome..." message.
7. I click on a third tab. "Please Wait..." pop ups. And remains. This time I decide to click Cancel after 15 seconds. Pop-up disappears and I now have a third tab displaying the "Welcome..." message.
8. Time to get really adventurous, so with the newly created third tab displayed I click on 'Streaming' followed by a click on 'Youtube' in the Tree. I am once again greeted with a blank screen and the "Please Wait..." pop-up. After 5 seconds I click Cancel and it disappears and the screen is filled with the Youtube "enviroment". I did not test if I could watch a YouTube video.
9. Still within the same tab I clicked on 'Google Video'. Same thing happened here as when I clicked on 'YouTube'.
10. I clicked 'YouTube' again and "Please Wait..." pops up. I leave it be and indulge myself with other activities for about 10 minutes. When I return to the screen, the pop-up has disappeared by itself.
11. I clicked 'Google Video' again and the same thing repeated here, I left the pop-up alone, took a break and returned about 30 minutes later. The pop-up was gone.
12. Now... when I click between 'YouTube', 'Google Videos' or any of the other choices in the Streaming Category, the "Please Wait..." pop-up do no longer appear. Clicking on a new tab instantly opens it up with "Welcome..." message.
13. I guess, at this point, Chromium has been fully downloaded. I test to play a mkv video and it loads right away with no additional downloading. Great! I'm set to go!
14. I notice now that all my custom library views are displayed in the tree even though I have not done a restoration of the library yet. Not sure if it picked up those automatically from somewhere?
15. Anyway... I decide to go to 'Library/Restore Library' and do exactly that... restore the last saved library backup. MC tells me it has to restart, so it shuts down and... with the desktop now displayed on my screen, there is also a small "Please Wait... Adding required components: Chromium" on top of it!
(GASP!) The difference was that the sun/flower downloading type animation on it was frozen. Clicking on the window gave me the message that MC has stopped working and I chose to close it down. After doing that, MC started up automatically again and it was time to test the functionality.
16. I began with playing the mkv file I previously tested. Once again it needed to download "Chromium" (no pop-up, just message on top of movie), so I let it do that. It took a couple of minutes and then the movie started to play.
17. I then (from within the same tab that displays my movies) decided to click on 'Streaming/YouTube'. "Please Wait... adding Chromium" pops up again. And I wait. I take a 15 minute break and comes back to the pop-up being gone and 'YouTube' properly displayed. After that, clicking on any of the other choices under 'Streaming' makes them appear right away without any "Please Wait..." messages. Same thing with clicking on a new tab. And a new. And a new. No problems.
18. Finally, I update MC to latest version 24.0.26. Everything seems ok.
Nothing revolutionary, I guess, but maybe some useful information can be found.