First published on TechNet on Jan 11, 2016
Hi, Linda Taylor here, Senior Escalation Engineer from the Directory Services team in the UK.
I have been working on this issue which seems to be affecting many of you globally on windows 8.1, 2012 R2 and windows 10, so I thought it would be a good idea to explain the issue and workarounds while we continue to work on a proper fix here.
The symptoms are such that after a password change, logon hangs forever on the welcome screen:
The underlying issue is a deadlock between several components including DPAPI and the redirector.