[Update: Please note that rolling back to older drivers can introduce security risks to your system! There’s a reason why software is updated–often it is because security issues are found. Please keep that in mind when making system changes.]

I discovered the camera on my Lenovo laptop wasn’t working. It’s the integrated camera app that comes with Windows 10. I made sure I hadn’t disabled it, attempted to update the driver, then, after receiving a message that the driver was already the most up-to-date, I rolled back to a previous driver. That got it working.