Windows 10: How can I restore the Windows bootloader after reinstalling Ubuntu in a dual-boot setup on...

Encountered issues in a dual-boot configuration with Ubuntu 23.10 and Kali Linux installed on a 512 GB SSD with Ubuntu allocated a larger partition. Windows was on a separate 1 TB SSD, consisting of two partitions - one of 150 GB for the C drive and another of the remaining 850 GB for mass storage. While using the Kali bootloader, a hard shutdown caused Ubuntu to stop booting. To resolve this, I reinstalled Ubuntu, leading to the erasure of the dual-boot setup. Subsequently, Windows refuses to boot.In my troubleshooting efforts, I attempted various solutions, including using bootrec commands

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How do I restore w10 bootloader? dual boot with ubuntu on separate hdd

EDIT: Look at post #24

 

How do I restore w10 bootloader? dual boot with ubuntu on separate hdd

diskpart
list volume (note the volume letter where the Windows 10 is installed)
exit

bcdboot x:\windows (replace "x" with the volume letter of the Windows 10 partition)

For example, bcdboot c:\windows or bcdboot d:\windows

If the volume letter is incorrect, you will receive the following error message: Failure when attempting to copy boot files.

-OR-

You need to boot from the Windows installation media in UEFI mode (marked UEFI in the boot menu), if Windows is installed in UEFI mode. If you using the wrong mode, you will receive the following error message: Failure when attempting to copy boot files. (see screenshot below)

diskpart
list volume (note the volume letter where the Windows 10 is installed)
exit

bcdboot x:\windows (replace "x" with the volume letter of the Windows 10 partition)





EDIT: Look at post #24

 

Ubuntu 9.10 Beta Karmic Koala quick review

this is what you need to do :

How to restore the Ubuntu/XP/Vista/7 bootloader (Updated for Ubuntu 9.10) *Pimp imp: