Full Screen Virtual Box?

Just playing around I installed successfully I think VirtualBox and I downloaded Windoze 11 from M$ website and installed it.

Trying to get the Winoze VM in full screen it seems to be ignoring the real size of my screen.
I get something like the pic (not full width). I know the pic is not full screen but this is almost the same after I press CTL+F and get full screen.

I modified in the VBOX Screen dimensions to be as I got from

[limo@asus ~]$ xdpyinfo | grep 'dimensions:'
  dimensions:    1366x768 pixels (361x203 millimeters)
[limo@asus ~]$ 

I had an error installing

==> Making package: virtualbox-ext-oracle 7.0.6-1 (Sun Jan 29 17:01:46 2023)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> Retrieving sources...
  -> Found Oracle_VM_VirtualBox_Extension_Pack-7.0.6.vbox-extpack
==> Validating source files with sha256sums...
    Oracle_VM_VirtualBox_Extension_Pack-7.0.6.vbox-extpack ... FAILED
==> ERROR: One or more files did not pass the validity check!
 -> error making: virtualbox-ext-oracle

Any advice on how to get true full screen is highly appreciated.
If possible to fix the second error.
Thank you.

Did you install the guest additions in Windows?

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I did not install anything related to VBox in Windows VM.
Where can I get and install?
I followed instructions at https://discovery.endeavouros.com/applications/how-to-install-virtualbox/2021/03/
But as mentioned I had an error as mentioned above. Is it this?

You shouldn’t need the extension pack.

Well you probably don’t have the drivers.

Install the package virtualbox-guest-iso in Linux. That will give you the ISO. Then you can load the ISO into the VM and install the additions from it.

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[limo@asus ~]$ yay virtualbox-guest-iso
2 aur/virtualbox-guest-iso-dev (+0 0.00) 
    The official VirtualBox Guest Additions ISO image for virtualbox dev version
1 community/virtualbox-guest-iso 7.0.6-1 (36.5 MiB 50.6 MiB) (Installed)
    The official VirtualBox Guest Additions ISO image
==> Packages to install (eg: 1 2 3, 1-3 or ^4)
==> 1
[sudo] password for limo: 

I do not understand this

1 community/virtualbox-guest-iso 7.0.6-1 (36.5 MiB 50.6 MiB) (Installed)

How is it “installed”? How it gets installed after doing the yay virtualbox-guest-iso
But done now!
Rebooted the windows VM, still not full screen.

The package installs a file, namely: /usr/lib/virtualbox/additions/VBoxGuestAdditions.iso

That is because you skipped this step:

So now that you have the ISO, load it into the virtual drive of the VM. Then you can install the guest additions inside the VM.


I could only do as shown in pic!
Sorry, it seems I am a long way backward!
How and what to do going from here.
Last time I used VBox was like more than 10 years ago.

Once it is loaded in the VM you should be able to see it in Windows explorer in the VM.

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Done and perfectly running as intended.
Thank you very much @dalto
As usual @dalto for the rescue.
Thanks a lot. :+1:

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