Windows 10 in triple boot with Endless OS, Ubuntu 18.04 on acer aspire 3.

I bought acer aspire 3 with Endless OS pre-installed in Oct 18 after my Lenovo Laptop was broken. Subsequently I installed Ubuntu 18.04 in dual boot on this Laptop in dual boot.

Recently I came to know that Windows 10 installer allows installation on a partition. I downloaded Windows 10 ISO and made bootable USB stick using WoeUSB on Ubuntu 18.04 as posted in may last post.

I created 90 GB NTFS partition and booted on Windows 10 usb. I selected Windows 10 Home Single Language edition which was installed earlier on Lenovo Laptop. After choosing Custom install I selected the partition and installed Windows 10.

After install I could configure Windows 10 and boot into the Desktop.

Later on I changed the boot sequence in BIOS and changed to Ubuntu 18.04 Grub 2. After booting in Ubuntu 18.04 and updating grub I got the Windows 10 boot entry in grub 2.

Using WoeUSB on Ubuntu 18.04 to make bootable Windows 10 USB stick.

Windows 10 installer ISO is freely available on Microsoft site. Microsoft recommends its media creation tool which does not work on Ubuntu. WoeUSB is a utility which can be used to create boot-able usb stick from Windows 10 ISO. To install on Ubuntu:

sudo add-apt-repository ppa:nilarimogard/webupd8
sudo apt update
sudo apt install woeusb

Insert USB stick larger than 8 GB formatted with single partition.
Run WoeUSB, select Windows 10 ISO.
Select NTFS File System since FAT does not support files larger than 4 GB.
Select target device USB stick (say /dev/sdb)
Unmount the partition opening a terminal

sudo umount /dev/sdb1

Click on install.

WoeUSB will make bootable USB stick with Windows 10 installer.