1. Install Grub2 On Usb Drive From Windows 8
2. Install Grub2 On Usb
3. Install Grub2 On Usb Drive From Windows 10
4. Install Grub2 On Usb Drive From Windows 7

Manual for creating a bootable USB drive (UEFI / GRUB):

Select Drive letter of your USB Device. In the YUMI Step 1 dropdown make sure to select the Drive Letter that identifies the USB drive where you want Super Grub2 Disk to be put in. If needed click on Showing All Drives but then be more careful than before. You might screw the current system you are using if you choose the wrong drive. Reads grub.conf and then passes the button to the Windows boot loader. That’s the basics of multi-booting of dual booting with Linux and Windows using GRUB. Recommended Articles. This is a guide Install GRUB. Here we discuss How to Configure and Install GRUB and the basics of multi-booting of dual booting with Linux and Windows using GRUB. MultiBootISOs is a tool that let you install Grub on a USB flash drive. I really like it because it lets me boot from ISO files and let me put a bunch of ISOs on my USB and choose which one to boot.

Run BootIce (is a part of the distribution)
choose the right USB flash drive (need be more than 2GB)

Re-format the flash drive in the USB-HDD mode
(Optional, if the flash drive is allready USB-HDD, but it is necessary if the flash drive was used as a boot drive earlier):

Flash drive must be formated to FAT32 file system, and it needs to make active:

Set the MBR through BOOTICE (GRUB / BOOTMGR):
(Or install Windows NT6 MBR, boot WinPE5 menu only)
(It also can be useful for older BIOS, when GRUB4DOS loaded incorrectly)

Set PBR through BOOTICE (BOOTMGR) :

Install Grub2 On Usb Drive From Windows 8

Extract all of AdminPE_UEFI.iso to the root of the USB drive,
using UltraISO or WinRAR.

Install Grub2 On Usb

Done!
P.S. when USB drive boot into the UEFI mode will load reFInd, and will be available MemTest86 for UEFI and UEFIMark.
In the case of Secure Boot (loading only signed UEFI loaders):
you must first switch UEFI loaders (you can switch it to another computer):
rEFInd to Microsoft BootManager: run [flash drive]: EFI Microsoft64.cmd.
Microsoft to rEFInd (return rEFInd loader): start [flash drive]: EFI rEFInd64.cmd

Install Grub2 On Usb Drive From Windows 10

There will also be displayed loaders from Linux and MacOSX (UEFI)
(if they are present in the system)

Install Grub2 On Usb Drive From Windows 7

To run PE on tables read the manual for running on the TabletPC
To run PE in UEFI mode (Secure Boot) read the manual for running in UEFI mode (Secure Boot) .