It seems users online have been sharing issues with the Windows Hello feature not functioning in low light conditions. This problem was initially reported in April, and it appears it isn’t due to a software bug. According to the information provided in the April Patch Tuesday release notes, Windows now necessitates both an IR sensor and a camera capable of facial recognition for login purposes.
Earlier, Windows Hello utilized infrared (IR) sensors to generate a 3D facial map for identification purposes. This function resembles the Face ID feature on iPhones. Consequently, Windows Hello offers a swift, reliable, and secure way for biometric verification.
IR sensors can function effectively even in low-light conditions, which was crucial for Windows Hello to operate in the dark previously. Unfortunately, a security flaw has been found in Windows Hello, compelling Microsoft to revise the face recognition process. Now, Windows Hello demands that color cameras are active to clearly capture a visible face during sign-in.
Typically, webcams aren’t designed to function optimally in dark environments; they require an external light source to clearly capture your face and surroundings. This is the reason why Windows Hello might not be working effectively for some users under low-light conditions. Now, it demands a well-lit face from the webcam, along with the 3D scan using IR sensors.
It’s been found that users on the internet have noticed an interesting fact: if you disable your webcam through the Windows Device Manager, Windows Hello will once again only authenticate using infrared sensors. This allows you to log into your computer even in a dark room. However, it is important to note that disabling the webcam means you won’t be able to use it for video calls anymore.
After trying out this alternative solution, I can confirm it resolves the issue effectively. Prior to about two months ago, Windows Hello on my Surface Laptop 7 was effortlessly authenticating me even in the dark without any issues. However, since April 8, this functionality ceased and now demands that a light is switched on or the screen brightened so that the camera can initially capture my face.
According to Microsoft, they made this update to rectify a security issue in Windows Hello, which essentially means that while it can no longer function in dark conditions, its enhanced security features are now more robust. It’s unfortunate that one of the conveniences of using IR sensors for facial recognition login on Windows has been compromised.
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2025-06-16 15:39