I don’t use Docker, so this may not help you, but I find bpytop and ssh works just fine. :)

I’m sticking to FreeCAD.

No

sudo apt autopurge cortana

Linux is an option.

Best-Class AV

ClamAV is good.

You can also run a VM.

If possible, turn networking off!

Dealing with viruses:

• Get a linux iso and scan potential threats with ClamAV/TK.

• Fresh install (If you are paranoid.)

• Manually find and remove dangerous software. (VirusTotal may help.)

I could put it to use ;)

In seriousness, have you consider using it as a DNS filter (Pi-Hole) or Samba share (32GB)?

I also could recommend running wireguard/openvpn, and Port Forward to the outside would for a secure connecton.