All virtual machines require that basic system requirements are met, such as a minimum amount of hard disk space or RAM. The minimum system requirements for Windows Virtual PC are displayed in the figure.

Like physical computers, virtual machines are susceptible to threats and malicious attacks. Users should install security software, run the Windows Firewall, and update patches and drivers.

To connect to the Internet, a virtual machine uses a virtual network adapter. The virtual network adapter acts like a real adapter in a physical computer, except that it connects through the physical adapter on the host to establish a connection to the Internet.