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MS-DEFCON 3: Secure Boot triggers recovery keys

Posted on July 31, 2024 at 02:45 CDT by Susan Bradley • Comment in the Forums

ISSUE 21.31.1 • 2024-07-31

By Susan Bradley

It’s time to check whether your boot drive is encrypted.

As I predicted, Microsoft’s July 2024 security update may trigger a request for recovery keys among those who enabled BitLocker or drive encryption. That’s because the update included a change to Secure Boot.

This is problematic enough that I’m lowering the MS-DEFCON level to just 3, rather than the more common level 4 I usually suggest at the end of the month. I think you should install updates, but don’t install and then review. Instead, understand this problem ahead of time, prepare as needed, and then update.

Anyone can read the full MS-DEFCON Alert (21.31.1, 2024-07-31.

AskWoody Plus Alert, MS-DEFCON Alerts, Binarly, BitLocker, Drive Encryption, KB5040430, KB5040437, KB5040525, KB5040527, MS-DEFCON, MS-DEFCON 3, Patch Lady Posts, PKfail, Secure Boot

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