Windows 10: Windows 10 update changed my boot drive in the bios

Last night 11/11/2020 I selected update and shut down for windows update KB4586781. When I came out this morning, my computer was still on, and was asking me to install Windows 8 and it was a continuous loop. I had to go into the bios and reselect the proper boot drive. My system seems to be ok now but I'm still analyzing the various functions. Just wanted to report this bug and my fix. Wasn't sure where to do that so decided to come to the Windows forum.

Jim Slocomb

*** Email address is removed for privacy ***

:)

 

Windows 10 random automatic repair after changing boot priority.

Hello. So i have an Windows 10 Pro. Sometimes when i am changing in bios boot order from USB to HDD ( SDD ) windows starts booting with AUTOMATIC REPAIR and then restarting. Is this something with BIOS \ Windows 10 bug related? Tested on pc and on laptop , and sometimes it doing the same.


Situation on PC first,listen:

Few days ago after i change boot in UEFI BIOS from USB to SSD.
Then Windows 10 showed at 1 boot Automatic Repair.
When starting Windows 10 boot loader starts by "preparing automatic repair" and diagnosing pc.
Interesting is that if I restart Windows (after procedure mentioned earlier) it will boot normally. This startup problem was occured only when starting system again after shutdown or restarted pc from windows.So i was needed 2 boots to boot properly to windows.
But on pc, format was needed to remove completely issue and after format is fine.

Pc :
2x8gb Kingston Hyperx 1600mhz DDR3
SSD samsung Evo 250 gb
4790k stock
Asus Sabertooth Z97 Mark 2 with UEFI BIOS


Now laptop with old standard bios:
On laptop i made the same operation, change boot from USB to HDD and on first boot Windows 10 shows Automatic Repair. But it happened once and i cant reproduce. No format was needed.

laptop is very old with 2gb ram

Why on pc format was needed when on laptop not?



Thanks for suggestions.

 

Windows 10 will only boot if selected from the BIOS boot menu.

Hello,

Thank you for contacting Microsoft Community.

We understand the inconvenience you have experienced.

• You mean to say, every time you need to make changes to Boot Order in BIOS, to start your computer correctly?
• What is the make and model of your computer?

I suspect that the problem might be due to outdated BIOS update
or with Boot Configuration data. Suggest you to check for the latest BIOS update and Chipset drivers for your device hardware on Manufacturer website. If you find a new one, try to update the same to see if it correct
the issue. If problem still persist, then I suggest to rebuild Boot Configuration Data to see if it makes any difference.

Let us try to repair your computer by creating a Windows 10 Bootable media (I.e. USB or DVD) using
Media Creation Tool.
Use your computer or some other connected to Internet for creating a Bootable media (Windows 10 ISO image file). Once you're ready with Bootable Media, follow the below mentioned
steps.

• Insert the Windows installation disc in the disc drive or connect USB media, and then start the computer.
• Press a key when the message Press any key to boot from CD or DVD appears.
  
  If your PC does not detect the media automatically
  • During the restart process, read the screen for any instructions that explain how to interrupt normal startup and enter the basic input/output system (BIOS) setup utility. Most PCs use the F2, F10, ESC, or DEL key to begin the BIOS Setup.
  • Look for a tab in the BIOS Setup Utility that is labeled Boot Order,
    Boot Options, or Boot. Following the directions on the screen, use the arrow keys to go to the
    Boot Order, then press Enter.
  • Locate the CD, DVD, or USB flash drive (this might be called Removable Device) in the Boot list. Following the directions on the screen, use the arrow keys to move the drive up so that it appears first in the Boot list. Press Enter. The boot order
    sequence is now changed to boot from the CD, DVD, or USB flash drive.
  • Press F10 to save your changes and to exit the BIOS Setup Utility. Select Yes in the confirmation window. The PC will restart. Allow the PC to restart normally. The scan will take a few minutes and remove any malware that may be infecting your computer.
• Select a language, a time, a currency, a keyboard or another input method, and then click Next.
• Click Repair your computer.
• Click the operating system that you want to repair, and then click
  Next.
• On the Choose an option screen, select Troubleshoot. Select
  Advanced Options > Command Prompt
  under Advanced Options.
• Type Bootrec /RebuildBcd, and then press
  ENTER. This command will rebuild boot configuration data if in case any issue with Boot files causing this issue.

Once you done with the above steps, see if the problem still persist.

Let us know how it went.

 

Windows 10 boot drive

Is Windows 10 also limited to a max of 3Tb for a boot drive?