Think I had a virus or trojan

Every current laptop I have seen, plus every netbook I have seen have DB15 (analog) monitor output. This is what your PC probably used (blue connector). With a docking station (pro grade laptop only) you will get a DVI (digital) output (white connector) as well. Many home grade laptops also have an HDMI port in addition to the 15 pin. I personally use an Asus 24" 1920px1200p display at work and at home. Regardless of form factor, you should be able to configure either extended desktop or mirrored configurations.