Windows 10: PC loops booting to UEFI bios instead of Windows Boot Manager

I have an Asus Z170-K motherboard with only Windows 10 installed since many years, it worked very well. Yesterday, I left my computer ON for the night and this morning, Asus UEFI Bios Utility was shown.I tried to restart computer, to choose specifically Windows Boot Manager on Boot Menu but I am always redirected to Bios.I also tried to boot from an USB Windows 10 installation key to repair something, but all commands fixboot, fixmbr, etc. can't work due to permissions. However, I checked my data are all here on my C: drive.I also tried to set some changes directly into Bios disabling CSM,

:)

 

HP Laptop Boot Loop

I am encountering a boot loop problem with my HP laptop. Upon startup, it shows the HP logo and loading dots for about 11 seconds, then goes to a blank screen for approximately a minute before automatically restarting. The power button does not turn off during this cycle.

Troubleshooting Steps Taken:

• Tried hard reset and accessing BIOS/UEFI settings.
  
• Unable to boot into Safe Mode or recovery environment.
  

please see here the recorded video demonstrating the boot loop behavior for reference.

Any advice, troubleshooting steps, or insights into what might be causing this problem would be greatly appreciated.

Thank you in advance for your help and suggestions.

 

Why is 'Windows boot manager' the only option I have under UEFI boot in BIOS?

I converted my drive to gpt, it created the 100mb partition etc. I've run command prompts to make sure boot is in there. But when in bios, I went to change legacy to uefi in boot sequence, but the only option under uefi was windows boot manager.

If I set it to that then it just results in boot loops of diognostics and failed repairs. Anybody have any ideas?

 

Changed to gpt and uefi bios, now windows wont boot

Emil Gyldenskog Nøsavik

Thank you for posting in the Microsoft community.

When a MBR hard disk is converted to GPT, if you can't get into the system, it's usually due to incorrect BIOS settings or no UEFI boot. Here are the steps to solve this problem:

1. Enter PE system: Use a USB flash drive to boot and enter the PE system (pre-installation environment) to make sure the data is normal.
   
2. Check the BIOS settings:
   
   • Make sure UEFI boot is set in BIOS.
     
   • If the BIOS is set to UEFI boot, but the partition is still MBR partition, you need to modify the BIOS settings to match the hard disk partition mode and boot mode.
     
3. Use a PE tool that supports UEFI: Make sure the PE tool you use supports UEFI repair boot.
   
4. Create an EFI system partition:
   
   • In PE system, open "Disk Management", find the SSD (usually labeled as "Disk 1"), right-click and select "Compress Volume" to compress about 500MB of space.
     
   • Open a command prompt, type `diskpart` and enter.
     
   • Use the `select disk` command to select the SSD.
     
   • Use the `create partition efi` command to create the EFI system partition.
     
   • Format the EFI partition using the `format fs=fat quick` command.
     
   • Use the `assign` command to assign a drive letter to the EFI partition.
     
5. Bootstrap Repair:
   
   • In a command prompt window, type `bcdboot x:\windows /s y: /f uefi`, where `x` is the drive letter where the system is located in the SSD and `y` is the drive letter of the EFI partition.
     

Hope the above information can help you



Best Wish

Shawn Z | Microsoft Community Support Specialist