Hololens emulator -DEP6957: Failed to connect to device 'xxx' using Universal Authentication. Please verify the correct remote authentication mode

Question

I am trying to install Hololens emulator.

I successfully installed and run demo application on my home PC. However, I am trying to have it working of my business laptop where work should actually be done. I installed VS 2022 17.4 and all Windows SDK available, and also all workloads needed. I use Unity 2020.3 as it is recommended and I installed multiple Hololens emulators. One old works by I get authentication error so app cannot be deployed. On emulator 10.0.20348.1528 I get this error:

The emulator is unable to verify that virtual machine is running.

Failed to find the required partition 'MainOS' on the mounted virtual disk

Edit:

Please ignore error message above. I installed just a little older version of emulator and emulator now works. Now problem is with deploying from Visual Studio.

I visited https://learn.microsoft.com/en-us/windows/mixed-reality/develop/advanced-concepts/hololens-emulator-archive and installed HoloLens 2 Emulator build 10.0.20348.1518 (so not latest 10.0.20348.1528) and emulator is now starting but I get deploy error:

DEP6957: Failed to connect to device '192.168.191.217' using Universal Authentication. Please verify the correct remote authentication mode is specified in the project debug settings. DllNotFoundException - Unable to load DLL 'SirepClient.dll': The specified procedure could not be found. (Exception from HRESULT: 0x8007007F) [0x80131524]

Details:

ConnectTo-Device: END (Failure, 0:00:00.034)
BootstrapAsync-Deploying: END (Failure, 0:00:00.037)
Deploy: START
    Bootstrapping.Target = PII(3a4e6275-4097-a054-94dd-e12793d099f0)
    Target.DeviceGuid = 3a4e6275-4097-a054-94dd-e12793d099f0
    Target.MemorySize = 4096
    Target.EmulatorName = HoloLens 2 Emulator 10.0.20348.1518
    BootstrappingSucceed = False
    BootstrappingError = Err_SSHBootstrapping_ConnectedDevice_FailedToConnect
    BootstrappingHResult = -2146233088
    DeploymentSucceeded = False
    Target.Id = 1280
    ProjectGuid = {2fabdf39-a3a3-4497-95ba-5aee089ebf0f}
    Project.TargetPlatformVersion = 10.0.22621.0
    Project.TargetPlatformMinVersion = 10.0.10240.0
Deploy: END (Failure, 0:00:00.001)

Inside deployment view inside Visual Studio I can see logs that everything emulator needs is enabled (like Hyper-V) otherwise emulator wouldn't event start. Once again emulator starts this time but deployment fails.

ConfigurationParser/Constructor/EnumerateEmulators: END (Success, 0:00:00.483)
ConfigurationParser/Constructor: END (Success, 0:00:00.598)
IsEmulatorSupported: START
    Is64BitOperatingSystem = True
DetectSlat: START
    isHyperVRunning = True
DetectSlat: END (Success, 0:00:00.109)
    SlatState = SlatAndHWVEnabled
    IsEmulatorSupported = True
IsEmulatorSupported: END (Success, 0:00:00.117)

My Windows version is 1909 (unable to upgrade because some error) but on home PC it is 21H2. That seems the only difference to me.

This is screenshoot of Project-> Properties-> Configuration Properties-> Debugging (I think emulator is selected here, not remote device so error message is misleading)

EDIT and solution:

I fixed it by updating Windows to 22H2 (was very challenging) to update since there was update error constantly showing up but I did it using Windows Update Assistant and by downloading Windows to USB)

After that I installed Unity 2020.3.2F1 and VS 2022 17.4.

This emulator experience is by the way terrible, not only regarding downloading but with running it and using it.