Security News > 2020 > February > Microsoft Pulls UEFI-Related Windows Update After Users Report Problems

Microsoft has decided to remove a couple of Windows security updates that address a UEFI issue after some users complained that the updates caused serious problems.
Some users reported that their devices became unusable after trying to install the KB4524244 security update for Windows 10.
Microsoft launched an investigation and decided to pull KB4524244, along with KB4502496, which contains the same patches for Windows 8.1, Windows Server 2012, and an earlier version of Windows 10.
"This standalone security update has been removed due to an issue affecting a sub-set of devices. It will not be re-offered from Windows Update, Windows Server Update Services or Microsoft Update Catalog," Microsoft said.
At the time, the researcher assumed that Microsoft would revoke the certificate used to sign the Kaspersky bootloader to prevent abuse, and it seems that updates KB4502496 and KB4524244 did just that.
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