install ubuntu on virtualbox grub boot loader

Now, if you go with 'Something Else' option, its time to create the partitions manually.P.S.: The option 'Erase disk and install Ubuntu' should be avoided on dual-boot because is potentially dangerous and will wipe out your disk completely.

In case you want a custom partition layout, check the Something Else option and hit on the 'Continue' button to proceed further. On the 'Installation Type' screen, prefer to choose the Install Ubuntu alongside Windows Boot Manager option if you want to automate the process and do not wish to have a personalized partition scheme.

Next, leave both options from Preparing to Install Ubuntu unchecked and hit on the Continue button again Choose the language you wish to perform the installation and click on the Continue button to proceed further

On the 'Launcher' hit on the second icon from the top, Install Ubuntu 18.04, and the installer utility will start. Note: After the boot media finishes loading into RAM you will end up with a completely functional Ubuntu system running in live mode From the menu select Install Ubuntu and hit the Enter key to continue

Once the media boot-up, a new Grub screen should appear on your monitor.

Reboot the machine and instruct the BIOS/UEFI to boot-up from the DVD/USB by pressing a special function key (usually its F12, F10 or F2 depending on the vendor specifications).

Note: Do not forget to create a Bootable USB having Ubuntu loaded into it before you start with the next section. On 'Shrink C:' enter a value to shrink in MB and hit the Shrink option to start partition resize From here, right click on the 'C:' partition and select Shrink Volume in order to resize the partition Once you are in the command prompt, type diskmgmt.msc to open 'Disk Management Utility'.

Login to your Windows machine with an Administrative account and right-click on the Start Menu > Command Prompt (Admin) option to open Windows Command Line with elevated privileges.

Section - I: Getting Windows OS ready for Dual-boot To get dual-boot working fine on your laptop, you can check these steps:

Install ubuntu on virtualbox grub boot loader