Sometimes after installing Ubuntu in dual boot mode alongside Windows, it is seen that CPU directly boots into Windows. This problem occurs when Grub is not set as the default boot manager in your CPU. So when you turn on your PC, it directly loads Windows boot loader by default and Windows boot loader does not give you any option to log in to Linux. So you unwillingly log in to Windows every time. In such case you need to make Grub as default boot manager. Grub gives you options to choose between the Operating Systems installed in your PC. So Yeah! Let’s us set Grub as default boot manager. First log in to Windows using an Administrative account . Right click on the Start menu > Command Prompt(Admin) to run Command prompt in admin mode. Now run this command in Command Prompt: bcdedit /set {bootmgr} path \EFI\ubuntu\grubx64.efi Now you are all set. Restart your PC and see the effect! Grub will load and then choose the OS from Grub menu you want