On one of the win10 PCs I maintain I have seen a couple of very long (15min) boot times in the past month. The disturbing part is there is absolutely no indication of what is being done during this time. What I think is happening is there is either a pending update, a new download or a system check that is causing that delay, but for whatever reason win10 is not reporting on it. Even when the boot finally reached the desktop stage, it was still unresponsive for many minutes. The only thing I could do was start task manager, but it was unresponsive so I couldn't learn anything. No malware found, so are these fugue states the new normal?

Note: this was all before the 1607 update, which took forever but seems successful.