Windows 10: After POST, Extended Black Screen Delay Before Windows Login

Hello,

I'm running a new install of Windows 10 Pro, 20H2 (OS Build 19042.746). Windows is booting from NVME (WD SN850), which is setup correctly in the BIOS.

At boot, the ASUS logo pops up, the Windows "circle of dots" spins for a moment, and then the screen goes dark for 20+ seconds, until the Login screen comes up. I have updated all of my drivers (nothing is flagged in device manager), and disabled fastboot. Still, the black screen persists.

After trying (unsuccessfully) to solve the problem through my own searching, I think I figured out how to run a boot trace. The problem is that I can't interpret it, beyond seeing that Winlogon Init seems to be taking a long time. Any suggestions from those better able to interpret the trace are very much appreciated!

Thanks so much in advance - this is driving me crazy, on a PC which should boot instantly to desktop!

boot_1.etl - Google Drive

:)

 

5 min delay on cold start between login screen and bg screen

Ok, let the powershell command run overnight
If the command didn't solve the problem, the try these steps in order:

1. Disable superfetch service
   • Empty the following folder c:\Windows\Prefetch\
   • Restart the computer
   • Si ça ne marche pas, passer à l'étape 2;
2. Disable the AppXSvc from the registry: change the "Start" key value from 3 to 4 (see the screenshot)

 

5 min delay on cold start between login screen and bg screen

After overnight looks

 

black screen

Hi Bart,

It is possible that you're experiencing black screen due to corrupted system files. To assist you better, we'd like to gather more information:

• Are you getting any error messages?
• What happen when you tried to login?
• What troubleshooting steps have you done so far?

In the meantime, we suggest that you follow the steps in this
article to troubleshoot black screen errors. You can choose which situation you're experiencing the error and perform the instructions.

Let us know if you need further assistance.