A recent Windows 11 update has changed the way a system option works. It is now less effective than before. Microsoft acknowledges and confirms that this is not a bug.
Apart from those that fix bugs, Windows 11 updates are often anticipated by users. They are an opportunity to discover what Microsoft has added to its operating system to make it more useful and better able to meet everyone's needs. But sometimes, we realize that after the patch, an option we used regularly has disappeared or, at best, has had its operation modified. Of course, not in a good way since it ultimately makes it less useful.
During last April's Patch Tuesday, the monthly Windows security update, several people noticed what they initially took for a bug: identification via Windows Hello did not work all the time. This is the facial recognition system integrated into Windows. By experimenting, Internet users were able to understand in which situation the latter was acting up.
This Windows 11 feature works less well and that's normal
It turns out that Windows Hello can no longer identify you if there isn't enough light. Yet it doesn't need to, since it uses infrared sensors to create a 3D scan of your head before unlocking the PC. From now on, “Windows Hello facial recognition requires color cameras to see a visible face during login.” In other words, don't expect to use it in the dark or in dim light.
The reason for this change, which seems like a regression, is simple: cybersecurity researchers have discovered a significant flaw in the system. It allowed a malicious person to impersonate a legitimate user and unlock the computer via Windows Hello. Microsoft therefore had to act accordingly, even if it meant making the feature less flexible in the end. As a reminder, you can easily disable Windows 11's biometric services, among other things, to make your PC more responsive.
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