1. A method for securely running a virtual machine on a computer, the method comprising: establishing a host runtime environment on the computer using a host runtime component of a secure virtual machine package; presenting to a user of the computer a choice of at least one virtual machine of the secure virtual machine package; receiving a selection from the user of the computer of one of the at least one virtual machine of the secure virtual machine package; accessing encrypted meta-data from the secure virtual machine package to obtain a user authentication security policy; authenticating the user of the computer according to the obtained user authentication security policy; establishing a virtual machine runtime environment on the computer including inserting a secure filesystem from the secure virtual machine package into a host operating system of the computer thereby authorizing a hypervisor of the host operating system; and accessing encrypted virtual machine files of the user selected virtual machine of the secure virtual machine package via the secure filesystem for the authorized hypervisor of the host operating system by the secure filesystem intercepting read requests from the authorized hypervisor to a regular file system of the host operating system and performing decryption of the secure virtual machine files in response to the intercepted read requests from the authorized hypervisor.