Microsoft Support Impostor - "Core IT Resolve"

In January 2015 I received a pop-up from "Microsoft" stating I was infected with a virus and to call a phone number.  I called the number and was connected with someone and got the problem resolved.  Little did I know that the person was from Core It Resolve who is now calling me at least 5 times a day and will not stop calling saying my computer is hacked trying to get me on my computer. This was not a Microsoft issue and they entered this on my computer somehow to get me to call them.   According to the info on the internet this is a scam company and and a lot of people are experiencing the same problems.  They are out of San Pedro, CA and call from an Unknown Number.  Just wanted to give everyone a heads up.  I should not have been no naive!!!