Cannot logon to the system - no options on logon screen.

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Symptoms After installation of Netwrix Password manager client (Logon prompt extension) it is not possible to log on to the system.

There are not any options on the logon screen except the Netwrix assistant
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Cause To allow users to reset passwords from the logon screen, Password Manager client adds its own credential providers.

There are two options for this - a link under logon field, or additional icon available after Other credentials is pressed.

During deployment of a link to the logon screen, default password providers get disabled and substituted with the Netwrix provider. More details on this can be found in the KB1870

Such issue can occur when some third-party software blocks the Netwrix credential provider from successful deployment.
Resolution To restore the logon screen, you will need to access the machines registry. for example by means of Remote Registry service
  1. Run regedit on another machine with credentials of an account, that has local admin permissions on the problematic machine.
  2. Select File - Connect network registry
  3. Specify the problematic computer name
  4. When remote registry is connected, expand %servername%\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\Credential Providers\{6f45dc1e-5384-457a-bc13-2cd81b0d28ed}
  5. Change the Disabled DWORD value to 0, or simply delete the value
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Alternatively you can restart the computer in safe mode.

Most common reason for Netwrix credential provider deployment to fail is Credential provider Filters installed by third-party vendors.
The list of filters can be found at the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\Credential Provider Filters registry key
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