Configure per-application WebView2 downgrade version: registry value DowngradeVersion (WebView2)UserHKCU\Software\Policies\Microsoft\Edge\WebView2

Policy ID: DowngradeVersion
Scope: Computer Configuration, User Configuration
Supported on: Microsoft Edge version 149, Windows 7 or later
Source: Microsoft Edge Policy Templates (version 155.0.4283.45)
Category: Microsoft Edge WebView2 › Loader Override Settings

Registry

(list values)

REG_SZComputerUser

…\Software\Policies\Microsoft\Edge\WebView2\DowngradeVersionHKLM\Software\Policies\Microsoft\Edge\WebView2\DowngradeVersion
HKCU\Software\Policies\Microsoft\Edge\WebView2\DowngradeVersion

Enabled value: Depends on the option value
Element: Set value name to the Application User Model ID or the executable file name. Set value to the target full 4-part version string (for example, 151.0.2178.0).
Value type: REG_SZ
Explicit value name: true

Apply with .reg · CMD · PowerShell

ComputerMachine-wide setting

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Edge\WebView2\DowngradeVersion]
"<enter name>"="<enter value>"

CMD

reg add "HKLM\Software\Policies\Microsoft\Edge\WebView2\DowngradeVersion" /v "<enter name>" /t REG_SZ /d "<enter value>" /f

PowerShell

New-Item -Path 'HKLM:\Software\Policies\Microsoft\Edge\WebView2\DowngradeVersion' -Force | Out-Null
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Edge\WebView2\DowngradeVersion' -Name '<enter name>' -PropertyType String -Value '<enter value>' -Force | Out-Null

UserPer-account setting

.reg

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Policies\Microsoft\Edge\WebView2\DowngradeVersion]
"<enter name>"="<enter value>"

CMD

reg add "HKCU\Software\Policies\Microsoft\Edge\WebView2\DowngradeVersion" /v "<enter name>" /t REG_SZ /d "<enter value>" /f

PowerShell

New-Item -Path 'HKCU:\Software\Policies\Microsoft\Edge\WebView2\DowngradeVersion' -Force | Out-Null
New-ItemProperty -Path 'HKCU:\Software\Policies\Microsoft\Edge\WebView2\DowngradeVersion' -Name '<enter name>' -PropertyType String -Value '<enter value>' -Force | Out-Null