YAC is Virus Removal Tool, Registry Cleaner and PC Cleaner, it does not offer any real-time protection.
It is only to cleanup PC's which have already been infected with malware.
The website hides it registrant with Domains by Proxy Service- http://whois.domaintools.com/yac.mx
Registered in Scottsdale, Arizona (United States). It hosting service is located in District Of Columbia - Washington D.C. (United States), it's website indicates their company is located in Basil and has contact info from Basil- http://www.yac.mx/eula but is using url domain from Mexico. This is very suspicious for any company.
They pay for people to write positive reviews + You can buy facebook likes, youtube likes, comments, twitter followers online for a payment of a certain amount of money.