Help with VirtualBox abortion and host freezings

Help with VirtualBox

I ran Windows 10 on VMWare when I still used Debian. When I switched to Manjaro I started using VirtualBox, and after creating the new Windows 10 VM from scratch using the installer ISO I began experiencing some problems I didn’t had before (i.e. freezing the host, aborting, etc.).
My VM just aborted and this are the logs:

My computer has this specifications:

  • Kernel: x86_64 Linux 5.9.16-1-MANJARO
  • CPU: Intel Core i5-8400 @ 6x 4GHz
  • GPU: Radeon RX 580 Series (POLARIS10, DRM 3.39.0, 5.9.16-1-MANJARO, LLVM 11.1.0)
  • RAM: 2998MiB / 15946MiB (only Firefox open)

I setted the VM as:

  • VirtualBox Version: 6.1.18r142142
  • Base Memory: 8192 MB
  • Processor(s): 3 CPU
  • Execution Cap: 100%
  • Enable Nested VT-x/AMD-v: On
  • Video Memory: 128 MB
  • Enable 3D Acceleration: On
  • Guest Additions: Installed

Could you help me tune it right and troubleshoot my problems since I am a newbie and I could not find any real solution online that worked for me? Any advice is appreciated.
Thanks in advance for your time.

I thought “Nested VT-x/AMD-v” was only for running a virtual machine within a virtual machine?
And bump video memory to 256MB (click on the 128MB in the info pane on the right when the VM is selected) - this works on Windows version of Virtualbox and I think it does on Linux version, but not sure.