Windows 10 Boot issue

[TabuZx]

Hello. I wanted help regarding my problem.
I upgraded my win 10 to 1903 3 days ago. My PC was perfect before the update. After the update messed up.
Right after PC starts in , it wouldn't show any window logo or window loading screen for 20-30 minutes or more. Just black screen. Then it would turn on perfect. I tried to it then I saw another cumulative update popping up so I installed it in hope that it might fix my problem. Instead where it took 20-40 minutes it won't boot up forever. I waited 2 hours but no sign of it.
To let you know: I can't even access recovery mode or anything related to Windows. It just shows instant black screen right after that bios thingi or idk whatever we call it.
+ yeah all I can access is my bios setup and can choose which device to boot in.
I want to include I have a perfect working fast gaming PC so its all window's fault. I really need help regarding that. Hope you could do so.

 

[TabuZx]

Thank you for your 0 support but I somehow managed to get into advanced recovery, roll back to win 10 v18 and now it works again.

 

[WindowsPro]

It´s a long shot… but try if you can find any relevant errormessage in the Reliability monitor:

Reliability Monitor is the Best Windows Troubleshooting Tool You Aren’t Using

When it comes to hidden gems in Windows, nothing beats the Reliability monitor tool, hidden behind a link inside of another tool that you don’t use either. Why Microsoft doesn’t shine more light on this really useful troubleshooting tool, we’ll never know.

www.howtogeek.com

Check for "red X" etc. and check if there are any recommended solutions...