Unable to sign in to Cortana to turn it on
I chose not to use Cortana when I upgraded to Windows 10 recently. I decided to turn on Cortana now because of a particular issue. I reach the point of "Before we get started, I'll need you to sign in with a Microsoft account". I click the "Sign in" box. A grey/black box appears with a 'people' icon inside that then disappears.
This action prompts an application error as follows:
Faulting application name: AccountsControlHost.exe, version: 10.0.10586.122, time stamp: 0x56cc1660
Faulting module name: KERNELBASE.dll, version: 10.0.10586.306, time stamp: 0x571af331
Exception code: 0x00000004
Fault offset: 0x0000000000071f28
Faulting process ID: 0x1108
Faulting application start time: 0x01d1dd05e0841e4a
Faulting application path: C:\Windows\SystemApps\Microsoft.AccountsControl_cw 5n1h2txyewy\AccountsControlHost.exe
Faulting module path: C:\WINDOWS\system32\KERNELBASE.dll
Report ID: 8a8f48fc-7672-432c-bf6b-8acb012f9321
Faulting package full name: Microsoft.AccountsControl_10.0.10586.0_neutral__cw 5n1h2txyewy
Faulting package-relative application ID: App
Create a system restore point first.
Run Microsoft Account Troubleshooter.
Re-register the Cortana app and see if it helps. More suggestions here: Cortana not working.