Just turned phone off and waited a few seconds. Not every PC that installed MS14-045 or the other suspect patches reported problems. Another poster to the list commented this morning that the outage lasted about 3 hours. Within a 2 hour window I must've reset the phone 30+ times, seriously... Source
Now waiting for phone support to call me back but things are looking good with the advice to restore phone as a new user. I'm on Verizon and had the same problem in Feb. Windows 10 Anniversary Update: A guide to the builds The Windows 10 Anniversary Update is due this summer -- but if you don’t want to wait, you can install...