Acpi\tos620a

Modern ambient light sensors (like those in iPhones or Surface Laptops) are fantastic. The TOS620A ? It is primitive. It is slow. It reacts to shadows cast by your own head moving. Many users in 2009 actually disabled this sensor via the Toshiba Control Panel because they hated how it flickered.

Fix the driver if you want the full, original experience (flickering auto-brightness and all). Disable it if you want peace and quiet. But whatever you do, don't let that yellow exclamation mark haunt your Device Manager forever. acpi\tos620a

Don't worry. You haven't broken your computer. In fact, your computer is working exactly as it was designed to 15 years ago. The problem is that Microsoft and Toshiba have largely forgotten about the tiny component this driver controls. Modern ambient light sensors (like those in iPhones