For the Spyware Doctor 5.5, developers at PC Tools must have looked hard at the imperfections of the previous version because they really improved on them immensely. Its virus protection has received approval from various institutions though a full scan can take as long as an hour to complete. Spyware Doctor has lots of features that can protect your system better. It can thoroughly scan and clean an infested computer. Plus, it can block the malwares from infesting your computer again. The reviewer ran the Spyware Doctor 5.5 on a test system and it passed with flying colors, except perhaps for its speed which needs to be improved.