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My HP laptop came with Win 10 but cannot be upgraded to Win 11. I installed Ubuntu alongside windows, dual boot. Now I want to get rid of the windows. Can I just put my burned usb disk in and tell it to wipe the disk and install Ubuntu?

Bob Prince
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    If you have good backups, particularly /home & list of installed apps then you can easily reinstall and repartition how you like. Alternatively you can just delete the NTFS partitions & move /home into a new ext4 partition where the NTFS was. Do not erase the ESP- efi system partition which is FAT32. – oldfred May 30 '23 at 16:10
  • Thanks old friend, the Lenovo although about 7 years old was just taken out of the box. The win 10 is a nightmare I’ve done all the updates and maintenance chores but it just ain’t working right and takes 10 minutes to boot up. So if do a new install without the dual boot I haven’t lost anything. Your alternative is way over my head. Thank you for your help. – Bob Prince May 30 '23 at 19:04
  • If 7 years old, it may be better with a lightweight flavor as standard Ubuntu is more for systems that run Windows well. https://ubuntu.com/download/flavours Light weight flavors: Lubuntu, xubuntu, Ubuntu MATE, Budgie I use Kubuntu on a somewhat older system and it works well. It is more of a mid weight flavor. Depends more on specs, RAM, drive , video etc. – oldfred May 30 '23 at 20:11
  • https://askubuntu.com/questions/46863/how-do-i-remove-windows-7-from-my-dual-boot-system-with-ubuntu – Esther May 30 '23 at 20:58
  • Does this answer your question? [How do I remove Windows but keep Ubuntu?](https://askubuntu.com/questions/784/how-do-i-remove-windows-but-keep-ubuntu) – karel Jun 02 '23 at 12:47

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If you have a partition for Ubuntu and another for Windows you dont have to reinstall Ubuntu. you will start your laptop by Boot from an Ubuntu live USB flash drive, by disks utility format Windows partition, reboot by Ubuntu and open terminal to do thise command:

sudo update-grub

from now no Windows operating system in your hard disk or boot menu
if (Windows Recovery Environment) in your boot menu you can remove it by Grub-customizer:

sudo apt install grub-customizer

open Grub-customizer and remove Windows Recovery Environment and save.
for full Windows uninstallation you have to delete some files from 1st partition that called System Reserved (may be 500 mg) after that

sudo update-grub

this is other wayes to remove Windows: by Gparted, OS-Uninstaller

Talaat Etman
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    Grub customizer is a GUI/Windows approach which might be dangerous. If you value your data ,do it by hand. – kanehekili May 30 '23 at 21:56