Secure Boot certificate expired? How to check your Windows PC
The Windows Production PCA 2011 certificate expired on October 19, 2026. Here is how to check whether your PC has the 2023 replacement and what to do if it does not.
Windows Update
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KB5127648 Failed to Install? Fixes for 0x800f0845 and More
KB5127648 failing with 0x800f0845, 0x80070306 or 0x800f0989? Try these Windows 11 fixes in order, from Reinstall now to a manual Update Catalog install.
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Games crashing after a Windows 11 update? The AC-3 audio fix
Games or media apps crashing after Windows 11 update KB5124010? Microsoft traced it to AC-3 audio decoding. Here’s how to check for it and install the fix.
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Wi-Fi or VPN not connecting after the October 2026 Windows update: NTLMv1 fix
The October 13, 2026 Windows update blocks NTLMv1-derived single sign-on by default, breaking PEAP-MSCHAPv2 Wi-Fi and VPN logins. Here is how to confirm it and fix it.
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Smart App Control grayed out after KB5127648: how to fix
Smart App Control grayed out after the October 2026 Windows 11 update? Confirm KB5127648 is the cause and apply Microsoft’s registry workaround safely.
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Exchange OWA not working after the October 2026 Windows update: fix
OWA sign-in failures and emails stuck in the Outbox after the October 2026 Windows Server update come from a new Endpoint Mapper limit. Here is Microsoft’s workaround.
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USB headset no sound after Windows 11 update (Code 10): what works
A known Microsoft bug can leave USB Audio Class 1.0 headsets and DACs silent with Code 10. How to confirm it, what has helped, and why rolling back won’t.
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Windows 11 24H2 no longer gets updates: how to check your version and move to 25H2 or 26H2
Windows 11 24H2 Home and Pro got their final monthly security update on October 13, 2026. Here’s how to check which version you have and move to a supported one.
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How to stop Windows 11 restarting for updates during work hours
Set active hours, pause updates for up to 35 days and restart on your own schedule, using only Windows 11’s Settings app.
