Hey there
I'm using Acer aspire vx-15 with 128gb ssd and 1gb HDD
Windows 10 is installed on 128gb ssd and I wanted to install Kali Linux on HDD so I made a 40gb space unallocated for it.
Then I made a bootable USB using win32Diskimager.
I cannot boot into usb in uefi (with secure boot off and fast boot disabled) so I changed into legacy
After changing it to legacy I could boot into my usb and installed Kali Linux using graphical install
While installing
sdba was where windows 10 installed
sbdb (my 1tb HDD) where I made a 40gb space unallocated I installed Kali Linux here with automatically partition (recommended for new users)
And while installing grub bootloader I installed it manually on dev/sdb3 (the partition on which Linux was installed)
But after finishing installation
I reboot(I couldn't reboot in legacy so I changed it back to ufie)
It directly boots into widnows10
I tried using EasyBcd by selecting the partition in which I installed Linux but nothing happens...
So I tried booting in Linux using live usb and
Run some commands
Os-prober
But the only os it detects at that time is Linux debian on sdb3
(Even I cannot find the Linux on boot options after pressing f12)
Please help me :-(
I 've trying this since 5days thanks

Hi, Welcome to LQ,

If you install Linux in legacy boot mode, you will not be able to boot the Windows 10 at all and you'll have to switch between UEFI and Legacy all the time in order to have "dual" boot.

The Linux is not booting because its bootloader was not properly installed. You see, in Legacy boot mode, the system behaves like MBR and the bootloader should have been on an MBR on /dev/sdb or something. You wrote something confusing about the disk labels.

So, firstly, for us to be able to help you properly, please find out your disk labels correctly and tell us about the setup of your machine: how many partitions, their names/labels (sd..), their types and if there are any free space anywhere.

Secondly, I strongly recommend you install the Linux in UEFI mode itself. All popular distros currently support UEFI. Please find a way to boot the Live USB in UEFI mode. Do you really need Kali Linux? If you try hard enough but Kali is still not booting, would you mind trying Linux Mint?

Thirdly, do not let the install do anything automatically, it might mess up your system. If you manage to boot the USB, please report here and we will guide you step by step. And please keep a backup/recovery disk for your Windows 10, in case things go wrong.

My laptop have a 128gb ssd and a 1tb HDD
Windows 10 was preinstalled in the 128gb ssd and now want to dual boot with Kali Linux on HDD
In the partitioner while installing linux
sda-( is the 128gb ssd with Windows 10installed on it )
sdb- ( is my 1tb HDD where I want to install Kali Linux by shrinking 30gb from it)
sdc- is the bootable usb
Please help

Excuse me if you are quite aware of what you are doing, but are you quite sure you want Kali? I ask because I've seen cases of people who install Kili because they've been told about it without actually being told what it's for! The Kali site says

Yes I'm sure please help me

Ok then, I suggest you do your best to boot in UEFI mode. Did you use the 64-bit Kali iso?

Ok, sdb is your HDD, but you didn't give any detail about its partitioning. The problem is that if you want to dual boot in UEFI from separate hard drives, you will need an EFI partition on sdb as well. So, in that space you freed, later you'll have to make an EFI partition (to hold your boot loader), an ext4 partition and a swap with GParted.

Yes I'm using a 64bit Kali iso
I formatted my HDD with gpt partitioning but while installing Kali I can't find the USE AS EFI option :-(
I think I need to boot the usb from uefi rather legacy in order get this problem solved.

Exactly. Try to check if the USB partition has the bootable flag. Sometimes that flag is missing and the USB does not boot.

Also, try to see if you can get into a boot loader menu at start. On certain laptops, if you press F12 you get a menu with all possible EFI boot loaders the system detected. Try different Fn keys.

Hey thanks I downloaded the latest version and tried to install it in uefi mode and it worked