My Icon downloaded the update and has been stuck on the Verizon red screen of death ever since. Waited about 40 minutes and then powered phone off and restarted - got to the same point. It is stuck on the red screen. Ideas?
Joslantick, yikes! Let's make sure that we get your device back up and running with no issues. Can you please try to press and hold the Power Button and the Volume Down Key until the device powers off then release (approximately 10 seconds). Keep us posted if this gets you past the red screen. KevinR_VZWFollow us on Twitter @VZWSupport
Did you have the Dev Preview installed? I think you're supposed to downgrade before you update if you do. This link mentions Cyan, but i guess it would apply to Denim as well.
Windows Phone 8.1 Preview users still need to downgrade their OS in order to get Lumia Cyan | Windows Central