Installation fails with "WebView2 Runtime is already installed" error, but WebView2 is not working properly

الطالب معاذ عبدالقادر عبدالفتاح يحيى الشهاري 0 Reputation points
2026-09-29T17:40:26.85+00:00

I am trying to install an application that requires Microsoft Edge WebView2 Runtime. However, the installation fails with the following error message:

"Installation failed. The Microsoft Edge WebView2 Runtime is already installed for the system."User's image

The issue is that although WebView2 appears to be installed, it is not functioning correctly. I previously uninstalled Microsoft Edge using Revo Uninstaller, which may have caused WebView2 to be broken or incomplete.

When I try to install WebView2 manually, it says it's already installed andUser's image

won't reinstall it properly.

Could you please advise on how to:

  1. Completely remove WebView2 and reinstall it freshUser's image
  2. Or any other workaround to get this application working

Attached are screenshots of the error messages I'm receiving.

Microsoft Edge | Other | Windows 10
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  1. AI answer

    2026-09-29T17:40:58.83+00:00

    This usually means the WebView2 Runtime registration is still present, but the runtime is damaged or incomplete.

    Try this in order:

    1. Check whether WebView2 Runtime is listed
      • Open Control Panel > Programs > Programs and Features.
      • Look for Microsoft Edge WebView2 Runtime.
      • If it is listed, that confirms Windows still thinks the runtime is installed.
    2. Reinstall WebView2 using the official installer
    3. Remove the stale WebView2 registration from the registry
      • Warning: Editing the registry is risky. Incorrect changes can cause system problems.
      • On 64-bit Windows, check these locations:
        • HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\EdgeUpdate\Clients\{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}
        • HKEY_CURRENT_USER\Software\Microsoft\EdgeUpdate\Clients\{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}
      • On 32-bit Windows, check these locations:
        • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\EdgeUpdate\Clients\{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}
        • HKEY_CURRENT_USER\Software\Microsoft\EdgeUpdate\Clients\{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}
      • Delete the WebView2 client key shown above.
      • Then run the WebView2 installer again.
    4. If installation or repair still fails, use standard Edge installation troubleshooting
      • Run the Program Compatibility Troubleshooter from: Start > Settings > Update & Security > Troubleshoot > Additional troubleshooters > Program Compatibility Troubleshooter.
      • Make sure there is enough free disk space.
      • Run the installer with administrator rights.
      • Temporarily disable antivirus or firewall software if it is blocking installation.
    5. If the app still does not work after reinstall
      • Some apps check for WebView2 and reinstall it when the app starts.
      • If the runtime remains broken after reinstall, the issue may be with the app’s WebView2 detection or with the Edge update components.
      • In that case, collect the exact installer behavior and escalate through Microsoft Support if needed.

    Also note:

    • WebView2 is preinstalled on Windows 11 and installed on most Windows 10 devices.
    • Many apps built on WebView2 can trigger reinstallation checks when they are installed or launched.
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  2. EmilyS726 271.5K Reputation points Independent Advisor
    2026-09-29T18:21:52.9366667+00:00

    Type regedit in the search on the taskbar to launch Registry.

    Go to: 

    Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\EdgeUpdate\Clients\

    Right click on 

    {F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}

    and delete it.

    Go to this link https://developer.microsoft.com/microsoft-edge/webview2?form=MA13LH

    Download and install Webview2.

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    2 people found this answer helpful.
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