Yesterday was the official release of the Windows 10 "Anniversary Update". As of late yesterday evening, it still wasn't showing up in Windows Update, on either the desktop or the laptop. I decided to just go to Microsoft's website and GET the darn thing. Installed fine on the laptop, but I couldn't get the aspect ratio on my desktop monitor the way it should be. After phutzing around with it SEVERAL hours, I found the issue. Had to go to AMD's website and download drivers for Windows 8.1 for the Radeon graphics card. After installing the driver, I rebooted, selected the proper driver in the Device Manager, and all was well again!