[cosmie]

One of the other telltale signs of a VM are "things VMs can do that physical devices can't" - such as weird screen resolutions (when running in windowed mode rather than full screen), weird CPU core counts, physical ram values that aren't cleanly divisible into DIMM slots, etc.

[ColanR]

Good point. I guess that would be relatively easy to check for programmatically.

What else is there that could possibly indicate virtualization? Available instruction sets? Strange limitations of the given CPU? (e.g., the cpu presents itself as some Intel chip that's known to have 4 cores, but there's only 2 available)