Copiot, something went wrong.

I had the same issue on Windows 11 and noticed there was a security update ( KB5124008 ) that had installed last night.
Copilot is unaffected on IOS, so I asked it were there any known issues with copilot as a result of the KB5124008 update.

I followed the fix below by amending the local group policy setting and Copilot is now loading again on my Windows 11 device.

**Copilots Response:
**
KB5124008 is currently breaking Windows Copilot on Windows 11 for a large number of users. The update appears to reset or corrupt the Copilot integration layer (WebView2 + Windows Copilot policy), causing Copilot to either not open at all or remain stuck in a loading state. This matches the pattern seen in earlier updates like KB5055523 and KB5074109, which caused identical failures.  

Below is the exact fix sequence that works for KB5124008‑related Copilot failures.

🟦 Immediate Fix (works for most users)

1. Reset the Copilot Group Policy toggle

KB5124008 is resetting the Copilot policy on many machines.

1. Press Win + R → type gpedit.msc → Enter
2. Go to:

User Configuration → Administrative Templates → Windows Components → Windows Copilot

3. Open Turn off Windows Copilot
4. Set it to Disabled

(Yes, “Disabled” means Copilot is allowed.)  digitnaut.com

5. Restart Windows

Welcome Peter Harris

Thank you for posting in the Microsoft Q&A forum.

To better understand the issue, could you please clarify:

• When you open Copilot, do you see the message "Something went wrong" immediately, or does it appear after signing in?
• Are you using a personal Microsoft account or a work/school account?
• Does Copilot work normally in a web browser at copilot.microsoft.com using the same account?

Since you've already tried restarting and reinstalling, please also try these quick checks:

• Open Settings > Apps > Installed apps > Microsoft Copilot > Advanced options, then select Reset
• Open Microsoft Edge and ensure you can successfully sign in to your Microsoft account.
• Open Microsoft Store > Library and select Get updates to install any available updates for Copilot and related Microsoft components.
• Restart Windows and test Copilot again.

If the answer is helpful, please click "Yes". If you have extra questions about this answer, please click "Comment".   

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