There has been two calls from this telephone number stating that there have detected a problem on my Computer which they would like to fix for the company . When i inquired as to who was calling ,the male voice (heavy African accent) indicated that they had discoverded this problem and wanted to fix it. He tried to be convincing ,but i was not convniced . When i told him that i had received a call about a week earlier from that same number he said "well it's up to you" . I subsequently hung up ,called the number he gave to find that there was no cuch number. He did call by using a private signal.