Hi Imacri:Glad to share here that my issues have been fixed as of 2 days ago. I deferred updating the post/forum immediately as I wanted to be sure the issues are really fixed and running stable first. From 2 days ago to now, they are fixed and running stable.In summary:BIOS update > Done, fixed, stable with latest v1.13.0 [IMAGE] Support Assist  > Fixed, Installed, Running stable with latest v3.11.4.29 [IMAGE] Dell Command Update UWA > Fixed, Installed, Running stable with latest v4.4.0  [IMAGE] My Dell > v2.0.30.0 Unable to run as it asks for a forced update, but the update failed (by clicking update from app). I mean the update script runs, then it pushes Fusion Service to be installed (despite already having the current version running). After what seemed to be Fusion Installation running, it popped a notification that installation failed - then can only choose close app. Since I only use My Dell to get to SA, and SA wasn't able to be installed before -- I don't really care at all. My Dell is just a skin/ wizard to launch other Dell Apps -- so I don't really find it useful. Not able to update and to run the app is not an issue. [IMAGE]   Here's the detail of the issues fix I have achieved.BIOS Update:Manually downloaded the latest BIOS exe file from Dell Support site. Run it (as admin) from Windows does nothing, no error message, no nothing. It seemed to run, but no associated process is detected. Having that particular BIOS exe file run as admin in a DOS Windows (CMD) also does nothing. It runs and then just a blinking cursor in the C drive prompt.Having noted the installation steps outlined in the Dell Support site about updating the BIOS, that you can either do it from Windows directly, or from the boot selection menu - I tried the latter. Choosing the BIOS update exe file in the Boot menu (with a USB flash disk) seemed to run but nothing happens, until the PC rebooted and Windows starts again. However the BIOS update doesn't happen.I checked and found a different file format, which is a BIOS recovery file, .rcv. I downloaded the file Inspiron 3881 v1.13.0 BIOS_IMG.rcv and copy it to the USB flash disk, then try the BIOS update process again (also via Boot Menu). Voila, this time it works and my BIOS got updated to latest. So it seems that the Boot Menu BIOS update/flashing will only take the .rcv file and not the .exe file. Are you aware of this?   Dell Command Update UWA and Support Assist installation: After successful BIOS update, I tried my luck to install DCU UWA with version supposedly compatible with my Inspiron 3881 on Win 11 -  that is Dell-Update-Windows-Universal-Application_GP7HV_WIN_4.4.0_A00.EXE. Again, as before, it failed. Then I thought about your point of the possibility of my registry got messed up during the Win 11 build 22H2 roll back process to 21H2. I was like 90% certain my registry are OK since I only have issues with Dell apps. However, just to be certain, I rebooted the desktop, then login to Windows with a backup admin account, namely DELL. I do associate this DELL local account to my Microsoft account, so it has the same Microsoft's account credentials as my personal Windows account.While logged in as DELL (backup admin account), I tried installing the DCU UWA v4.4.0. Low and behold, it installed without errors! Run it, it acted normally - showing that I need to update some other Dell apps, specifically latest Fusion Service and Support Assist agent. I stopped right here, closed the DCU UWA app. I didn't do the update just yet.I rebooted the PC, then logged in with my personal account (not DELL). In this Windows, I ensured that OneDrive is syncing my current profile with this account to the DELL account profile (Apps and folders). So sure enough, when I searched for newly installed app, I found the DCU UWA v4.4.0 listed. I run it, and it runs normally. Searched for updates, and it displayed the same updates available, specifically, latest Fusion Service and Support Assist agent. I downloaded and installed them (from DCU UWA) -- and they installed just fine.Now I see Support Assist as a newly installed app. Run it, and it works. Runs well, and I can check for updates too. So this is the condition I had before I had issues. Just like that, 2 issues that had pestered me for weeks are gone, and also fixed the manual BIOS update issue I had before.My best guess is, maybe there is a change in my account profile (registry) that leads to issues. To say that the roll back from 22H2 to 21H2 may caused this is still iffy to me. The reason being, after the roll back, Dell apps like My Dell, SA, and DCU UWA still works just fine. My issues started when SA asked for an update, and the update failed. Then it also lead to DCU UWA stopped working.While working to resolve those issues, My Dell asked for an update. Update failed as described above. In a way, by side loading DCU UWA in another account (backup admin account) in the same Windows seemed to somehow enable the app to work also in my personal account. Note here, both backup admin account and my personal account is using the same Microsoft Account profile. Having a successful BIOS update is a good thing. However, I'm not sure if this is the reason why my issues are fixed. If I determine a more technical explanation to how this solved my issues, I will update this post again. For the time being, this is how I got my issues fixed.Your thoughts?Appreciate you taking the time this far to lead me to solve the issues.Relief, finally .... phewww ...
Dear all:After the previous Dell Update problem I had with Win 11-22H2 build, when I rolled back the Win 11 build to 21H2, all works again.Just today, SA popped a note to upgrade to latest version. I'm currently on v3.10.4.18. So I did, then things just fell apart. Not only the update failed (unable to complete update, please reboot your PC) -- but now Dell Update also failed (Dell Command Update UWA v4.4.0).Searched and tried all leads, none works. Even uninstalled My Dell v2.0.30.0 and reinstalled it. All but the Support Assist link works.For SA problem (failed update, then failed to run, failed to reinstall), I tried as much as ensuring no system files are corrupted (SFC, DISM, chkdsk /f), and ensuring I tried all suggested fix on the Dell Support Video (Support Assist fail to install) - none helps.For Dell Command Update UWA v4.4.0, reinstalling clean also failed (after clearing all related registry entries and related folders/files). I viewed the log, and it listed a long string of numbers (like 10-12 digits) as return error code - exactly the same as I had before, when having problem installing it under Win 11- 22H2 build. Best to say it is inexplicable error code.I even tried to log in Windows with a backup admin account, and try to reinstall SA and Dell Command Update UWA. Same results, didn't work.Any ideas? 
Dell Support Assist and Dell Update failed - Inspiron 3881 desktop with Win 
11-21H2