KB4524244 Security update for Windows 10 - February 11 Win Update

pietcorus2 said:

OK , thanks for the explanation .........still thinking it wont harm at all .............besides it will be corrected with next Win10-upgrade !

If you don't use reset this pc you will be ok.

If for some reason you need to go back to a fresh install just download an ISO and do it the old fashioned way(which I prefer any how)

A good article on the pulled update: Microsoft pulls security update after reports of issues affecting some PCs | ZDNet

The security update, KB4524244, was released on February 11, 2020, as part of the normal Patch Tuesday release cycle, and was targeted for all Windows 10 versions via Windows Update. It was intended to address a security vulnerability affecting third-party Unified Extensible Firmware Interface (UEFI) boot managers.

In its documentation for the update, Microsoft says its engineers have confirmed at least two known issues:

You might encounter issues trying to install or after installing KB4524244.
Using the "Reset this PC" feature, also called "Push Button Reset" or PBR, might fail. You might restart into recovery with "Choose an option" at the top of the screen with various options or you might restart to desktop and receive the error "There was a problem resetting your PC."
According to reports from users on Microsoft's support forums, some users encountered problems restarting after the update attempted to install, while others were signed in using a temporary user profile.

In a separate set of reports, owners of HP PCs with AMD Ryzen PCs reported issues with Sure Start Secure Boot Key Protection enabled. A Reddit thread includes more HP-specific reports.

Third-party Unified Extensible Firmware Interface (UEFI) boot managers is software like GRUB from Linux, rEFInd, Bootit bare metal, and so on.

Anibor said:

You use UEFI in legacy mode.

pietcorus2 said:

" You use UEFI in legacy mode. "...............dont understand , MOBO is an ASUS Z97-K with latest Bios-update from 2015 ( !)
Im sure its a Legacy Bios ..........
btw ; should you restore to 10 Februari , to get rid of it....??

Anibor said:

What I mean is:
"UEFI BIOS" is a widely used misnomer. The computer is either BIOS or UEFI.
Unless you are using a fairly old computer, it´s a UEFI computer. Now, UEFI can be used in a backwards compatible "legacy mode", activating the CSM module, but it´s still UEFI.

He might mean he set his partitioning MBR(BIOS or Legacy) instead of GPT(UEFI), which has nothing to do with this update though, although it is easy to confuse the two.