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Bula Vinaka
Oct 21, 2020

beach side
You used to be able to run both Edge Legacy and Edge Chromium by enabling the registry key:

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\EdgeUpdate\: Allowsxs (DWORD) set to 1

After the April 2021 update (19041.928), Edge Legacy was forcibly removed.

Someone figured out that if you copied the contents of the Edge Legacy application folder from either a backup of the March 2021 update (19041.867) or from a March 2021 ISO, you could run Edge Legacy again:

https://old.reddit.com/r/Windows10/comments/mshig6/restoring_edge_legacy_after_april_2021_update/

Somewhere between April 2021 and December 2021, that no longer worked. Edge Legacy exits immediately after launching it.


Here's where I'm at:

I'm on Windows 10 Pro x64 2004. I was on version 19041.630 (November 2020 update). I went to version 19041.1415 (December 2021 update).

Obviously, I lost Edge Legacy.


I uninstalled Edge Chromium:

Command prompt at:
C:\Program Files (x86)\Microsoft\Edge\Application\83.0.478.64\Installer\

Run:
setup.exe --uninstall --system-level --force-uninstall


I added the regisry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\EdgeUpdate\: Allowsxs (DWORD) set to 1


I copied the Edge Legacy program files back from the final published version from Microsoft (March 2021 update):

Delete:
C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe
C:\Windows\SystemApps\Microsoft.MicrosoftEdgeDevToolsClient_8wekyb3d8bbwe

March 2021 ISO:
https://isofiles.bd581e55.workers.d...vd_2d7423d8.iso

Open .iso in WinRAR, extract:
sources\install.wim

Open install.wim in 7zip, extract:
1\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe
1\Windows\SystemApps\Microsoft.MicrosoftEdgeDevToolsClient_8wekyb3d8bbwe

Copy the above two folders to:
C:\Windows\SystemApps\


I reset the packages (restores default settings):

Delete:
C:\Users\[USERID]\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe
C:\Users\[USERID]\AppData\Local\Packages\Microsoft.MicrosoftEdgeDevToolsClient_8wekyb3d8bbwe

Run PowerShell commands:
Get-AppXPackage -AllUsers -Name Microsoft.MicrosoftEdge | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register “$($_.InstallLocation)\AppXManifest.xml” -Verbose}
Get-AppXPackage -AllUsers -Name Microsoft.MicrosoftEdgeDevToolsClient | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register “$($_.InstallLocation)\AppXManifest.xml” -Verbose}


That's all I can think to do. Edge Legacy does not run, it exits immediately after launching.

Here's an x64dbg log:
https://pastebin.com/R45sXGit


Is there some way to run Edge Legacy on a more recent version of Windows (such as the one that I'm on - 19041.1415) that I might be missing, such as a command line parameter or switch, a registry key, or a local policy? Or is it simply not possible to run Edge Legacy on more recent versions of Windows 10 or 11?

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