running a guest operating system on ubuntu

[Lampochka]

you know, I now have deleted the virtual machine, I'm now popping up this when launching virtuals

[Lampochka]

but this is when you install the program

[socratis]

First of all, you do not bump a thread two hours after your last post! After 3-4 days, maybe. After 2 hours? Never. It's not good etiquette. We're volunteers here, not your 24/7 personal support. I have deleted your "bump" post.

Your VirtualBox is not installed correctly. You can see this from the message:

* No suitable module for running kernel found
  ...fail!

You need to clean your system from all VirtualBox traces and then install the official VirtualBox from https://www.virtualbox.org/wiki/Linux_Downloads. Install it, make sure there are no errors during installation, and we take it from there...

Also, you asked how to delete your VMs. Then you wanted to run your VM. What are you doing exactly? It doesn't make sense...

[Lampochka]

downloaded the program from the link which you gave, when you start the virtual machine, it jumps out again !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
00: 00: 34.679661 emR3Debug: rc = VERR_TRPM_DONT_PANIC

[socratis]

Yes. We already covered that part:

But, on top of that, you have the following major, unsolvable problem:

00:00:23.510772 !!         VCPU0: Guru Meditation -2403 (VERR_TRPM_DONT_PANIC)

This is the Guru Meditation that you're getting.

00:00:01.749757 HM: HMR3Init: Falling back to raw-mode: VT-x is not available
00:00:02.378146 Full Name: "Intel(R) Pentium(R) CPU B960 @ 2.20GHz"

And this is "why" you're getting that error.

Unfortunately, your Pentium B960 does not support VT-x. So, you can't run this VM as is. Your best bet would be to try something from the 4.3.x series, the 5.0.x series or the 5.1.x series. All of them are unsupported. Also, you can't run the newer OSes like Ubuntu 18.04. Maybe 12.04 or 14.04...

The higher the VirtualBox version, the newer the guest OS, the more dependent it is on the existence of VT-x, as the "raw mode" will be getting phased out over time.

You can't run this VM. Period.