System Mechanic comes with two versions, the much easier Standart edition and the Professional edition. The Professional edition is rated in many websites as one of the top softwares in the two categories it belongs, the system repair software and sytem utility tweaking software.
Sadly my trick only applies to System Mechanic but the good side is that System Mechanic Pro has so many features to repair and tweak your system and if you don't know what your doing, you'll just end up having errors and destroying your PC, making System Mechanic standard the best choice to tweak and repair your system without breaking any PC.