Not only are there major problems with webcams due to changes in the Windows 10 Anniversary Update, now it appears there are problems with various Amazon Kindle devices as well due. Not a lot of details are known but it could be an issue with certain USB chipset drivers. Microsoft is aware of the issue and promises a fix.
So far, the problems seem isolated to the Kindle ebook readers rather than Kindle Fire tablets, and, like many problems, it’s not affecting everyone. Some readers have reported that the issue only hits USB 3.0 ports, while others have issues across the entire system. It’s also been reported that some devices work perfectly if you connect the Kindle while the system is off, then turn it on again. Disconnecting and reconnecting the Kindle post-boot will still cause a crash and booting the system with the ebook reader connected doesn’t solve the problem for everyone, either.