1. A portable end-point security (PEPS) system designed to be plugged into a computing system, comprising: a PEPS processor having a memory operatively coupled thereto, the memory having stored therein instructions which when executed by the PEPS processor causes: an automatic loader to automatically trigger loading of the PEPS system when the PEPS system is being plugged into the computing system, the loading performed in cooperation with a primary operating system installed on the computing system; the PEPS system including a malicious software detector to scan a main memory of the computing system for malicious software; wherein the malicious software detector performs a scan of the main memory of the computing system following triggering of the PEPS system by the automatic loader by comparing existing data in main memory of the computing system with indicia of malicious software, wherein said scan performed by the malicious software detector includes the malicious software detector checking processes that are currently running on the computing system during said scan; wherein the instructions which when executed by the PEPS processor causes a detector to determine what level of security should be installed on the computing system; wherein the level of security depends on a presence of a security system already installed on the computing system and administrative privileges available on the computing system; wherein the security system permits the computer system to be secure; and wherein the PEPS system is plugged into the computing system via a computing system interface.