I received a call from this number saying that they could help my computer to get faster. Since it had been sluggish for a few weeks I allowed this to happen. After two hours and ten minutes McAaffe had been installed and within ten minutes after I hung up the entire system went down. The next day A t & T helped me get it back up and now it is pop up crazy. The caller was listed as A t & T Service and was a courtesy call.