I tried the most recent version of VB with Extension Pack.
I tried installing 3 different versions of Windows 10 as a guest, as well as trying to run other ready-made virtual machines.
All of them turned out to be very slow. Moreover, the ones I tried to install were so slow during the installation procedure that I was afraid they had crashed. In fact, one actually crashed with an error.
Virtualization is enabled in the BIOS and the computer has the necessary HW requirements.