Just installed the latest WIN10-Update and it has a bug (see title). To solve that issue use RegEdit and edit the entries below. If you don't find an entry, create a new 
Please backup ("export") the Registry before.
Reason seems to be that Cortana somehow stucks in initialization and loops.
Please backup ("export") the Registry before.
B4X:
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Microsoft\Windows\
CurrentVersion\Search]
"AllowCortana"=dword:00000000
"BingSearchEnabled“=dword:00000001
"„CortanaConsent“=dword:00000000Reason seems to be that Cortana somehow stucks in initialization and loops.