Duo Security incident
[All Deployments] Duo Desktop not being recognized on Windows 11 24H2/25H2
Duo Security experienced a minor incident on October 15, 2025 affecting Core Authentication Service and Core Authentication Service and 1 more component, lasting 7h 41m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Oct 15, 2025, 12:19 PM UTC
We are currently investigating an issue causing Duo Desktop to not be recognized during authentications on Windows 11 24H2/25H2. If possible, please refrain from upgrading to 24H2/25H2 at this time. However, if this has already been done, downgrading to the previous version will resolve the issue. Please check back here or subscribe to updates for any changes.
- identified Oct 15, 2025, 04:00 PM UTC
We have identified an issue with a recent Windows update that has caused Duo Desktop to not be recognized on Windows 11 24H2 and 25H2 and have some recommended remediation steps to resolve the issue. We have published a KB article with the steps: https://help.duo.com/s/article/9527 We are working with Microsoft to provide a more permanent solution in a future Windows update. Please check back here or subscribe to updates for any changes.
- resolved Oct 15, 2025, 08:01 PM UTC
We have identified an issue with a recent Windows update that has caused Duo Desktop to not be recognized on Windows 11 24H2 and 25H2 and have provided remediation steps in a Knowledge Base article linked below. While we work with Microsoft to ensure a permanent solution is provided via update, we will be marking this incident resolved and providing further updates through the KB article as well as via email communications. Why is Duo Desktop not detected on my Windows device after installing updates to Windows 11? https://help.duo.com/s/article/9527 Please check the KB article for any further updates.