Windows 10: any of y'all know how I could fix this? and set the boot file to EFI\Microsoft\Boot?

submitted by /u/Yuunyaa8
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:)

 

UEFI boot options disappeared from BIOS; now getting reboot and select proper boot device

In short, I need to get the system/BIOS to allow UEFI booting of the SSD.

Computer started up today with default BIOS settings.

• Only SSD 1(Windows boot) and SSD 2 were listed in BIOS; HDD 1 and HDD 2 were not visible
• System would not boot. Gave the 'reboot and select proper boot device' message
• Boot menu has no UEFI/EFI (or Windows Boot Manager) entries anymore

I went into Partition Magic/Gparted and confirmed :

• All drives are still showing
• All drives' data is in tact [EFI volume/partition is still listed (and can be browsed/files accessible)]

Gparted print out (note dev/sda2 apparently that is normal behavior) :

/dev/sda1 (locked) EFI System Partition--Fat32--/media/sda1--100.00mb--46.81MiB--53.19MiB--boot,esp
/dev/sda2 (exclamation mark) Microsoft reserved partition--unknown file system--no mount point--128.00MiB--unused spaced--msftres
/dev/sda3 basic data partition--ntfs--/media/sda3--118.58GiB--70.78GiB--47.80GiB--msftdata
/dev/sda4--ntfs--/media/sda4--450.00MiB--327.71MiB--122.29MiB--hidden,diag



As I am able to boot Windows installation from USB, I tried the standard startup repair. It said it was not able to fix any problems.

Next I tried to repair the EFI with Diskpart in the shell:

• sel vol 1 (note that Diskpart states EFI partition is 'hidden')
• assign letter=z:
• cd /d z:\EFI\Microsoft\Boot\
• bootrec /fixboot
• bcdboot c:\Windows /l en-us /s vz /f ALL

It completed all tasks successfully. Unfortunately that did not work.

Other things I have tried :

• Removing CMOS battery and replacing with a new one - my HDD started showing up again after doing this.
• Using the old MBR commands(in hopes it would force the Windows startup repair to recognize and fix a problem)

bootrec /fixmbr
bootrec /fixboot
bootrec /scanos
bootrec /rebuildbcd​

• Loaded BIOS 'optimized'/defaults (the system did this already once before, hence why I am in this situation, though doing it manually seemed like an option worth trying. Note that after doing this and restarting the system, HDD's stopped showing again)
• Removed new CMOS battery and left it out of the system for thirty minutes
• Formatted EFI and msftres partitions, then rebuilt the EFI boot records

In summary, am looking to force the BIOS to see the EFI partition on the SSD boot drive, as it is not an option any longer.

 

Lenovo Y50 / EFI network boot failure

According to Microsoft it is too small.

Anyway, you are also supposed to have the 500GB hard drive.

Lenovo Y50 Specifications

• Windows 8.1 (64-bit)
• 2.4GHz Intel Core i7-4700HQ.
• 15.6” FHD (1920 x 1080) LED Backlit.
• NVidia GeForce GTX 860M (4GB of DDR5)
• Intel HD Graphics 4600.
• 16GB DDR3.
• Hybrid 1 TB HDD (5400 RPM) + 8GB SSD.
• Bluetooth 4.0.

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I originally asked you to first check Boot Order and you said you got the PXE error

There are normally 3 possible reasons for that error you have.

1. BIOS Boot Order set to Boot to Network: Check BIOS settings for Boot Order.

2. Check cable connections between Motherboard and Hard Drive.

3. Failed Hard Drive.

I have also looked through Lenovo forums for your errors:

Lenovo P, Y and Z series Notebooks-Lenovo Community

Lenovo P, Y and Z series Notebooks-Lenovo Community

Lenovo P, Y and Z series Notebooks-Lenovo Community

 

Windows defender offline error: EFI\Microsoft\Boot\BCD - 0xc0000185

Hi Dave,

Could you provide us additional information to assist you better with this issue:

• What is the make and model of your device?
• Have you made any changes to the operating system prior to this issue?
• Are you able to boot the device to desktop with this error message?

This issue might have occurred due to corruption in the boot files or BOIS unable to detect your drive to boot.

I suggest you to refer to the below thread, check if your issue matches with the same.

If so, try the troubleshooting steps suggested by -.[Final]#[Boss].- and check if
it helps.

Error code after update File:\EFI\Microsoft\Boot BCD
Error Code 0xc0000185 BSOD

Hope this information is helpful.