Windows KB5121767 OOB update fixes shutdowns on some Dell PCs

Key Points:

• Microsoft has released emergency updates to resolve performance issues and unexpected shutdowns affecting some Dell PCs after installing the July 2026 Windows 11 security updates.
• The problem stems from a conflict between the new Windows USB-C Connection Manager interface introduced in the June 2026 preview update (KB5095093) and the Intel Innovation Platform Framework (IPF) Processor Participant driver on affected Dell systems.
• Affected devices show a yellow exclamation mark next to the Processor Participant driver in Device Manager and may experience poor performance, increased heat, battery drain, and shutdowns.
• Microsoft blocked the problematic update on affected Dell PCs and issued two out-of-band updates (KB5121767 and KB5121768) to fix the issue for Windows 11 25H2, 24H2, and Enterprise LTSC 2024 editions.
• Devices managed by Windows Autopatch will receive the fix automatically, while IT admins can expedite deployment via Microsoft Intune; users not affected do not need to take any action.