Installation failed to start Kubuntu.
Installation failed to start Kubuntu.
I separated my storage and set up Kubuntu successfully. The system suggested a restart and then choosing between Windows or Linux, but it ends up booting into Windows directly. Since both OSes are on the same drive, you need to adjust your boot settings so the Linux installation appears during startup. Check your BIOS/UEFI options for boot order changes.
During startup, your PC briefly allows pressing certain keys to access the boot menu, typically F10, then F2 or Delete to enter BIOS and adjust boot settings. If that doesn’t work, you might need to use Windows. Refer to the Microsoft guide for more details.
the OP stated that both OS are on the same device. For me it looks like a messed up MBR / GRUB installation. Try this: during boot (after POST) smash the down cursor button. Doing so will prevent the GRUB bootloader (assuming it is installed correctly) to auto-select to the default entry and boot into it - which could be your windows. If there is no GRUB bootloader whatsoever then you could try to use your ubuntu installation media and choose "boot existing system" (or somewhat like that) in it's initial menu. From there on you could boot into your installation and fix the GRUB bootloader from there on. But assuming that you are new and don't want to mess with the command line too much - a fresh install might be easier.
In UEFI you can select the EFI bootloader from the BIOS, often beyond just the hardware device. This is convenient because you don’t need to erase your EFI partition; adding another OS won’t destroy the boot loader of the existing one. It’s unusual for GRUB to overwrite the Windows boot block, but as you noted, it might now appear the installation didn’t complete properly or was done differently.