I am suspecting the guest additions in the repo might not be 100 percent with the fixed Vbox back-ported version - although sharing folders between Linux & Vbox and copy/paste between Linux and Vbox DOES WORK!
Thanks Zorin Devs for the back ported version... I can live with a few quirks
UPDATE:
I figured it out!
Whenever updating Vitualbox, Vbox Additions, etc in Linux the Guest Additions will also need to be updated in the Windows 11 Virtual Machine as well.
Hi, just a side comment, I get the same issue with virt-manager. I suspect (pure guesswork on my part) that you would need a dedicated second card purely assigned to VB. I have tried with virt-manager using a second GT-1030 but did not manage it. Perhaps I need to look at virt-manager settings more closely.
That is interesring. When I did run VB (over 5 years ago) it always baulked at 3d acceleration, perhaps because I am not a heavy gamer and don't have a high-end graphics card.
I made the switch to virt-manager during lockdown. I had two monitors. Just the one GT-1030 using VGA on prime monitor and HDMI on screen 2.
Host on the left (FerenOS later Devuan 3.0), on the right, Windows 7 Pro 32-bit and later, installing update to Windows 8.1 32-bit, virt-manager gave a cleaner desktop than VB, to such an extent, the VM's looked like bare-metal installs.
Additionally, I could never get USB 3.0 support in VB, no such issues with virt-manager. Whilst on the subject of USB, in virt-manager you can do a USB re-direct of any USB device attached to the host and bring it across to the VM, whether it be USB storage or a WiFi dongle.
Lastly, no need to release the mouse from VM to host as the mouse moved straight across from the host monitor to the VM monitor.
Nearly forgot, provided your VMs in VB are .vhd you can import them into virt-manager to become .qcow2 files.
If they are not installed then you can install them:
sudo apt install virtualbox-guest-additions-iso
sudo apt install virtualbox-ext-pack
Once you are sure they are installed and you have your Windows 11 VM up and going click on Upgrade Guest Additions in the VM just like in the picture example below:
When I used to use VB I would get the latest from the official site, together with the matching guest-additions which has to have the same version number as the VB version number.