You may remember it because it is so recent as we told you about it the day before yesterday. Windows 11 and Windows 10 have a problem with the latest update. And yes, it’s not clear to me that this phrase fits perfectly into the “It doesn’t matter when you’re reading this” meme, since Windows Update has become synonymous with Windows failure for quite some time now. This circumstance, as is already clear to practically everyone, makes postponing system updates the safest option.

The problem, and this happened in this case (and it is not the first time), is that the problematic update belongs to the group of those that should be installed as soon as possible, since they are responsible for correcting security problems of the most diverse nature. So if we install them, we run the risk of them being faulty and causing some problem in the system. And if we don’t install them, we’ll be exposed to the security threats they fix.

In this case, as we already told you, the problem occurs after the installation of the August security update for Windows 11 (and also its version for Windows 10), you know, the now classic Tuesday patch, and that on this occasion, in addition, in order to eliminate some security problems, it also takes the opportunity to make changes that prevent Linux from booting on dual-boot computers. If we were wrong, we would see this as an aggressive WSL promotion technique.

In fact, this update addresses a security issue found in some Linux bootloaders, but the problem is that it was not properly addressed and as a result causes unintended corruption of Linux bootloaders, corruption that allows the system to continue booting into Windows but prevents it from to be done with Linux. At the moment, they have proposed a temporary solution, but as we read in Neowin, they are already working on a definitive one.

This solution is based on which the community has already publishedit just adds a few more Windows settings, but they will surely be returned in a later update. If you were affected, you should disable Secure Boot, reinstall the version of Linux affected by the Windows 11 update, including in the process reconfiguring the bootloader, and once that process is complete, enable Secure Boot, otherwise Windows won’t be accessible either. This way you will have access to both OS again.