1. A computer-implemented system for automated configuration of a computer system according to a security policy, the system comprising: at least one computer system having at least one installed application attempting to access a network; a policy application module configured to acquire configuration data from the computer system prior to the computer system being permitted network access; an instruction forming module configured to generate at least one configuration change instruction based on the configuration data provided by the policy application module; a security policies database accessible by the policy application module; an applications database accessible by the instruction forming module, wherein: the instruction forming module generates at least one configuration change instruction and provides it to the policy application module; and the policy application module executes the configuration change instruction on the computer system and implements a change in the configuration of an operating system of the computer system defined by the configuration change instruction, wherein the policy application module sends, to the computer system, a link for determination of a type and a state of the computer system, wherein the link points to a location of a control application configured to determine configuration of the computer system, and wherein the policy application module executes at least one configuration change instruction using the control application.