My Recovery Environment and DualBoot Menu Are gone. Please Help!!

edo101 said:

I did a windows update on my secondary Win10. When I did that, I lost access to my main Windows 10. I only got it back by restoring an image I made weeks before. Currently I can access my main Windows 10 but the moment I run an update on my secondary partition and do a reset of it, I will lose boot access to my primary Winwdows 10

After you do an update on your secondary partition or a Reset, open a CMD window as administrator and type:
diskpart
List disk
select disk n (replace n with the windows drive number, it's probably 5)
list part (take note of the "primary" Windows 10 partition letter)
select part 1
assign letter=W
exit
bcdboot X:\Windows /s W: /f UEFI (replace X with the primary Windows 10 partition letter found with list part)
diskpart
select vol W
remove letter=W
exit
exit

Megahertz said:

After you do an update on your secondary partition or a Reset, open a CMD window as administrator and type:
diskpart
List disk
select disk n (replace n with the windows drive number, it's probably 5)
list part (take note of the "primary" Windows 10 partition letter)
select part 1
assign letter=W
exit
bcdboot X:\Windows /s W: /f UEFI (replace X with the primary Windows 10 partition letter found with list part)
diskpart
select vol W
remove letter=W
exit
exit

After you do an update on your secondary partition or a Reset, open a CMD window as administrator and type:

bcdboot driveletter:\windows

(replace driveletter with the primary Windows 10 partition letter that you can see in explorer or diskmgmt )


bcdboot defaults to the current boot mode and system partition. Allocating letter to system partition and use of switches not needed in this scenario.

For what I know, on a Win 10 dual boot from same drive, only one Recovery partition is used. @SIW2 can confirm or deny.