PC Health Advisor
Full user review
I cannot think of any pros.
i regularly scan my computer and fix registry errors. Using my regular application which CNET rates as very good, i found 4 errors. Running PC Health Advisor, it found 293 errors. To pay this much for an untested application of this type is crazy.
I hate people/companies coming in the back door and trying to allure you into purchasing their product while teasing you with "FREE". They never stated the cost or even a mention that you will have to purchase until you have completed everything.