But you are using the physical PC to host a virtual machine, so you're actually using them both.
Also, there is still a layer of interface between virtual and physical (to allow you to copy and paste between them, for instance) and this interface could be classed as an attack surface for viruses, malware, etc.
I've used virtual PCs (for this and other reasons) and, largely, it worked. What worked best, though, was a separate physical machine with no networking (no internet access, wireless or other private networking of any kind).
is it normal to only use a virtual pc and not my real pc?
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But you are using the physical PC to host a virtual machine, so you're actually using them both.
Also, there is still a layer of interface between virtual and physical (to allow you to copy and paste between them, for instance) and this interface could be classed as an attack surface for viruses, malware, etc.
I've used virtual PCs (for this and other reasons) and, largely, it worked. What worked best, though, was a separate physical machine with no networking (no internet access, wireless or other private networking of any kind).