I've installed a virtual machine running Windows XP on my iMac. The sole purpose is to run Age of Empires via Steam. Windows keeps on with its "You're not protected", saying I need antivirus programs, firewalls and stuff. Is there any potential risk for me? I mean, if I get a virus to the VM, I assume the virus will be sandboxed within the XP machine, and I'll delete it by simple deleting the VM, and just install a new instance? Any advice would be highly appreciated.