I can no longer uninstall Ubuntu 20.04 LTS. What to do?

Ga
14

I installed the new 64 bit version of Ubuntu. Now my system is a 32 bit system. At least before it was Windows 10 in 32 bit. I have now downloaded the Media Creation Tool and played it on a stick of mine. If I now go to the boot menu or BIOS, the stick is not shown to me.

Because I was unsure, I once played the 32 bit and the 64 bit version on the stick. He is not recognized both times. I checked in the BIOS whether the USB ports are active… They are. The Creation Tool automatically formatted the stick to FAT32. Could it be because of it? Or is there any other way to uninstall Ubuntu? The device is just a laptop without a CD / DVD drive, otherwise I would have tried it with my old Windows 7 CD a long time ago…

I have to say that Ubuntu somehow doesn't work properly. Probably because I played a 64 bit system on a 32 bit. The Wi-Fi module is e.g. Not recognized either. There's no way to activate the Wi-Fi and to be able to connect. That's why I wanted to knock it down again.

And yes I know that was not really smart, but I didn't care that it was a 64 bit version…

Does anyone have a smart idea what I can do?

lo

Do you have a UEFI system? Or an "old" normal BIOS system?

Ga

I think a normal bios

lo

Then please check the system information. Is in BIOS mode.

lo

Wait… You only have Ubuntu on it?

Ga

Yes exactly. Thrown down Windows 10 and installed Ubuntu.

lo

Hops, I understood it differently… Well, it doesn't matter. Have you tried other USB ports yet?

Ga

Yes, tried everything. In the BIOS I have now tried changing the boot mode from UEFI to Legacy Support under Boot and with Boot Priority to Legacy first. This will display the stick. I just did it 5 minutes ago…

Then Windows Setup also loads when I select the stick. The problem now is that the keyboard is not responding. I can't navigate through the setup. I can only cancel it with ESC, so that it restarts and I can't do anything again…

lo

The problem now is that the keyboard is not responding. I can't navigate through the setup. I can only cancel it with ESC

Why with a keyboard? You only need the mouse in the setup.

In the BIOS I have now tried changing the boot mode from UEFI to Legacy Support under Boot and with Boot Priority to Legacy first.

Do not install in legacy mode. Try again on UEFI. Usually the bootloarder is displayed, not the stick. Is the stick displayed in the boot menu (in UEFI mode)?

Ga

No, only Ubuntu. I only have this one option to choose when legacy support is disabled.

lo

Then the stick is wrong. Namely for the legacy, not for the UEFI mode. I would take another stick and try again.

Ga

Okay. I will try it. I'm pretty sure that's the mistake.

lo

You're welcome.

mo

The term install is unfortunately used with two meanings.
Once for installing programs in an operating system and then installing an operating system on a computer.

While in the first case there's always a functional operating system that can also undo the installation of a program, in the second case there's only the hardware. But it can't uninstall (nor the BIOS / EFI).

In this way, you will never be able to uninstall Ubuntu.

The rest of your question doesn't fit the heading anyway.

The BIOS has a very limited range of functions and can't operate every hardware. It may be Not able to read from USB ports if they are on additional cards (maybe via a HUB), not directly on the motherboard. Find such a USB port!
If the stick still does not appear in the BIOS boot menu (you mean what can be reached via keys such as F8?), It is not bootable, the ISO is damaged or incorrectly placed on the stick.

You can't bring a 64-bit operating system to a 32-bit computer (not even a bit!).
Why don't I understand that Ubuntu is not working properly if the USB stick with the installation ISO is not recognized?

What else do you have on the PC? Windows?
So if Ubuntu is installed (albeit incorrectly), then it also left the boot loader (grub) in the MBR on a hard disk.
If you should now "uninstall" Ubuntu, which only changes the Linux partitions, Windows will no longer boot.

First describe what is actually on it.

Ga

"What else do you have on the PC? Windows?" Yes, I still have Windows on my PC. I also created several boot sticks via Rufus…

"First describe what is actually on it."

The laptop is completely empty. I had everything deleted during the Ubuntu installation, so that only the new operating system is on it.

As I found out, a 64 bit Windows was installed. That's why the Ubuntu installation worked.