From past experience with this and other games, it might be useful for the posters here to indicate what malware/anti-virus software they’re using.
Some of them buffer up changes to files and then don’t commit them if they’re unsure that the files in question are okay to change. I know MalwareBytes had an issue with this for a bit as well as a few others.
This has all the earmarks of the same issue - software detects and out of date condition and downloads and “writes” a patch and then doesn’t see the patch applied so it does it again.
It might be interesting to see if there is a commonality on what system protection software is in use because I’m not seeing this problem at all but some of my guildies are.
I turned all mine off before hand… but yeah good point usually.
Okay I solved it… Delete all the WOW folders AND Battlenet… Dont uninstall them actually go to explorer and physically delete them… then install… now I can get in.
That may only point to the problem I suspect is at fault.
Creating NEW files is generally okay with most protection software.
It’s updating existing ones that gets dodgy.
And if you take this approach back up your WTF folder so you don’t lose your addon and addon configuration information.
Windows only AV and firewall, no update to either recently as I have turned windows update off until the end of November over a week ago.
Addons are stored in the Interface folder and I have a batch file that saves the interface and WTF folders to a second drive when I run it for all the versions of the game.
The addons themselves are easily replaceable. It’s the settings that are a PITA to replace. I should have been more clear about that.
As an experiment, try downloading BitDefender (it’s free and it’s the best in the world discounting a close rival that’s Russian in origin - BD is Romanian and they have a burning hatred for all things Russian so it’s generally a safer choice if you’re worried about the Kleptocracy-based Russians corrupting someone at Kaspersky and getting themselves a back door).
Once in, activate it and let it replace the default stuff and see if it gets rid of the issue.
The “free” BitDefender is exactly the same as the paid version except you don’t get the “dashboard” (which I don’t find that useful anyway).
https://www.bitdefender.com/solutions/free.html
Full Disclosure: I use BitDefender, but I have no fiduciary relationship with them. I do not work for them, get paid to shiil for or represent them in any way. I’m just a (former) IT pro who found these folks a few years back. I’ve been impressed with every aspect of their product and company.
This post was initially made 12 days ago (as of this edit). I’d been experiencing the endless loop for a good 24/48 hours at this point; I’d open Bnet, it’d update and it would continue to do this while I played or when I closed the game and tried to open it again. Since then I have:
Uninstalled / reinstalled Bnet.
Uninstalled / reinstalled WoW (that was fun on a connection that’s almost dial up levels and is limited).
Removed all addons / replaced all addons with their most up to date versions.
Tried the Beta Client and then back to the Live version.
Tried several suggestions around the forum but that went nowhere either.
Nothing has worked and since it is relevant I’m on the latest version of Win10 (think it just had a feature update actually).
Don’t seem to have errors / permission things, it just loops endlessly and if I dare leave it open it will keep doing these little updates every couple of minutes before reclaiming the space and being quiet until another couple minutes pass.
Update01: I did notice one thing though. For years I’ve had the WoW folder on an external SSD (to free up the main drive) and it’s caused / received no issues. Curious, I actually moved the entire WoW folder to the main drive and tried launching it from there. It succeeded; the loop ceased! I opened and closed it a couple times to make sure and it didn’t attempt to update again. I checked what had changed; the folder permissions (since the main drive has the Security Tab while the external SSD does not). In the end I moved the entire thing back to the external SSD and sure enough the loop has returned. So, by that observation it might have something to do with permissions, but I have no clue why it would start now (well, twelve days ago) since it’s been perfectly fine for years. Just wanted to add that to the report.
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Same. My game keeps updating and when I launch it, it crashes with Fatal Error #134. When I repair and scan it updates again and does the same thing over and over. Cannot access the game.
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I have had this issue for a few days now.
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Happening to me today. Its been updating or waiting on another update for an hour now.
Having the same thing since pre patch update almost every day a new update . Why Blizzard on World of Warcraft you having so many updates .
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Please do something about this issue? I been unable to play /update anything despite fallowing your instructions and also uninstalling and reinstalling Battle.Net. I do work and have things to do and my time to play is really tight.
It is very unpleasant to try all the remedies you Blizzard put out there and find out that none of them worked. Science yesterday afternoon, I been trying everything and still the same problem.
I know you guys are aware of the issue affecting many players and probably will get this fix eventually, but please, put more emphasis on fixing this for us, the ones who can’t play or have the same issue.
You know how much money I’ve put in this game with this account, make it worth it please.
Thanks
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Same issue here. It began late last night and hasn’t stopped. Never had this issue before.
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Just chiming in as experiencing this as well, as of this morning. Constant updates for Retail, PTR, Classic and TBC Classic, all always queued for updates
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Hi Rhielle, funny seeing you outside GD 
Also, I have this problem as well.
Same
What’s worse is that it’s slooow, it takes forever to initialize
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Mine has been doing this since last night.
It just did it again as I was typing this!
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Wanted to add my experiences with this issue to the thread.
I have both Retail and TBC Classic installed on my computer, with no other games installed on the Battle Net app. Since yesterday evening, November 11th, 2021, they have both constantly been updating with what appears to be the same small patch.
I can still log into the game between the times they have patched, but the updates keep happening whenever I leave the game. When they get updated, if I manually go to check for updates, the game will patch again with the same patch.
Some general info for my computer:
-I have tried to delete my Battle Net cache and temp files, and the same issue has been happening.
-I have tried running Battle Net as an admin, with the issue still happening.
-I have Windows 10 on this computer.
-I have no addons installed and have never installed any addons at all.
-I have BitDefender for my antivirus, and it has never given me issues with WoW. There is no indication from its logs that it is affecting WoW’s files in any way that I can tell.
If I think of anything else that would be helpful to report, I’ll be sure to add to this thread as well. Any help in fixing this would be appreciated. Thank you!
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And now I’m constantly getting disconnected, as well. No addons running, can’t loot stygia from my corpse after dying, even though my corpse is sparkling and the cursor says I can loot…
Same problem been happening since last evening. Only windows defender and firewall installed. All wows try to update every time bnet app opens or I exit out of a game.
Sadly I have BD and also have this issue. I even have exceptions specifically set for Battle.net app and also WoW itself. I used to have a weird issue with some interaction between a program and WoW (it was either Discord or OBS, can’t remember), but disabled the automatic profile switching and that resolved it.
Same as you, I am not paid to endorse BD, I just like it. 
OH, also, in order for OBS and Discord to work properly with WoW, I have WoW and the Battle.net client set to always run as Administrator. This has been working fine for…eons, it feels like.
Same. I am 100% terrified of losing my addon settings because I have them all configured just so and it would take forever to re-configure them. I also copy my Screenshots folder because sometimes I really wish I had done that for older screenshots.
I go to a paranoid extent with it though almost 
I have the batch file copy to another physical hard drive, then from that hard drive I have it synced to Google Drive so it’s not only cloud-stored but also versioning is a thing in case I mess something up.
In case anyone’s interested in the nerdiness of this, the commands are roughly like so (run as administrator for best results and modify the first path to your install location, the second path where you want the files to go):
xcopy "C:\Program Files\World of Warcraft\_retail_\Cache" "D:\WoW Backups\Cache" /v /s /r /y
xcopy "C:\Program Files\World of Warcraft\_retail_\Interface" "D:\WoW Backups\Interface" /v /s /r /y
xcopy "C:\Program Files\World of Warcraft\_retail_\WTF" "D:\WoW Backups\WTF" /v /s /r /y
xcopy "C:\Program Files\World of Warcraft\_retail_\Screenshots" "D:\WoW Backups\Screenshots" /v /s /r /y
/v verifies the integrity of each new file, /s copies folders and subfolders except empty ones, /r overwrites read-only files, and /y overwrites existing files without prompting.
Anyway that’s not the point of this thread. Help us, Blizz 