Search:

Boot-Repair report almost always shows this:
sudo efibootmgr -v

You should have at least two entries one for Windows & one for Ubuntu that use partUUID of ESP - efi system patition.
Your line...

At the top of gparted is Device.
A blank drive defaults to MBR, but you can change to gpt which for UEFI you want.
Since drive is gpt, not sure but I expect changing it to gpt may erase drive.
...

One possible solution:
https://askubuntu.com/questions/1305270/bitlocker-is-blocking-ubuntu-20-04-installation-in-a-dual-boot-system-with-windo

Does Windows boot directly from UEFI boot menu, not from grub.
If so then it is UEFI Secure boot, or if not a Windows issue.

I am anti-laptop, although I have two.
One newer laptop is for travel and has Windows just for taxes in US.
Other laptop is so old batteries have all died, but I was able to use it with an...

You also now show UEFI Secure Boot on.
Sometimes a Windows update also updates UEFI firmware resetting to defaults which may turn Secure Boot back on.
You may want to turn it off, but not...

Have you tried a lighter weight flavor?
https://ubuntu.com/download/flavours
Light weight flavors:
Lubuntu, Xubuntu, Ubuntu MATE, Budgie
Flavors of Ubuntu only come with three years of supported...

Ubuntu does not fit on DVD anymore.
Some of the lighter weight flavors may, but standard install is using a smaller USB flash drive. Install process with dd image copy of ISO to flash drive,...

Part of the advantage of Linux partitions is ownership & permissions. This help restrict unknown users from running apps from the system directly if ownership & permissions are set correctly.
...

Some UEFI firmware updates, reset UEFI to defaults.
That may turn UEFI Secure Boot on, or make other changes from any you may have made to install Ubuntu originally.

My desktop is now older and...

Backup Windows before you delete it.
We find many who totally erase Windows, then later find one app or game they have to have that only runs in Windows.

Make sure UEFI & SSD firmware are up to...

If you go to first post & header line, you should be able to edit title.

Drivers would not be on a drive, but on the installer, or would need to be added to the installer.

You should also make sure you have latest firmware for both UEFI & NVMe drives.

I have never...

Windows 7??
That was normally old BIOS/MBR configuration. Systems since 2012 are UEFI with gpt partitioning.
With old BIOS/MBR installs you only have one MBR (per drive).
So if you have two...

I use Kubuntu and no snaps.
I am using about 16GB of a 30GB partition.

Since Ubuntu now defaults to use a lot of snaps, I have seen users with 20Gb of snaps only. So now larger / is often...

Still running Kubuntu with no snaps.

I used this to install Firefox.
You also have to reset priorities as shown or it will reinstall the Firefox snap....

That sounds more like what I did back before grub2. And grub2 became the standard in 2010.
Systems since 2012 are UEFI, and UEFI boot is different than the old BIOS boot, also.

Best just to keep...

Not sure what you mean?

You have /boot, which is not required for most desktops, but is used with servers & LVM when full drive encryption is specified. Full drive encryption means not dual boot,...

I use rEFInd on a tiny old too small for anything else flash drive for emergency boot. Saved me a couple of times.

But I see a newer version is available.
https://sourceforge.net/projects/refind/...

Signed driver is UEFI Secure boot.
Windows may need a driver for NVMe drives with secure boot.

Google found this:

My grub with commented (#) lines excluded.



fred@Z170-jammy:~$ cat /etc/default/grub | grep -v '#'
GRUB_DEFAULT=0
GRUB_TIMEOUT_STYLE=menu
GRUB_TIMEOUT=3 ...

You are not changing quiet splash, you are changing it to blank per 1fallan's suggestion. Which is good.
But I prefer to use these settings over the defaults. noplymounth is an alternate to the ""....

Many UEFI can update from UEFI directly if file extracted into FAT32 partition which UEFI can read.
Some also update from a DOS bootable flash drive.

If nvme not installed you have to installed...

Your UEFI firmware version number looks low or older.
Best to make sure you have latest firmware for both UEFI and NVMe drive.
You can directly see that:
sudo lshw | grep -m 1 -A 5 "*-firmware" & ...

You ran Boot-Repair report when in BIOS boot mode. You need to run in UEFI boot mode.
Boot-Mode setting in UEFI/BIOS is default for installed system. You have to choose mode when booting live...