Hello,

My previous setup was ubuntu 17.04 and windows 10. Everything worked smoothly. Grub showed both Ubuntu and Windows. I am starting to get into pentesting so i wanted Kali installed instead. I have kali installed kali 2017 everything installed fine. Except windows 10 does not appear on my grub. I can boot into windows by going to my bio.

Things I have tried:

mount windows sda then os-prober then update grub. didnt working. I have tried updating the 40_config grub file didnt work. I cant find anything that works.

heres the output from fdisk -l:
Disk /dev/sda: 256.2 GiB, 275064201216 bytes, 537234768 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 129DADD2-1E1D-478A-88E2-02FF539CC54D

Device Start End Sectors Size Type
/dev/sda1 2048 923647 921600 450M Windows recovery environment
/dev/sda2 923648 1128447 204800 100M EFI System
/dev/sda3 1128448 1161215 32768 16M Microsoft reserved
/dev/sda4 1161216 454678527 453517312 216.3G Microsoft basic data
/dev/sda5 454678528 454680575 2048 1M BIOS boot
/dev/sda6 454680576 503777279 49096704 23.4G Linux filesystem
/dev/sda7 503777280 537233407 33456128 16G Linux swap


Disk /dev/sdb: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 6CC21119-76E4-4551-8317-08574B867453

Device Start End Sectors Size Type
/dev/sdb1 34 262177 262144 128M Microsoft reserved
/dev/sdb2 264192 1953523711 1953259520 931.4G Microsoft basic data

when i go into my bios there is still an ubuntu(hard drive) option do i need to delete that? I am stuck any help I would greatly appreciate it.