Scam to gain access to your computer!!!!  Called several times the last couple of days.  Finally answered this morning.  Man with very broken English informed me that a problem had been detected on my computer that could cause irreparable damage to my hard drive and he could assist me in correcting the problem.  I thanked him and said I would contact my tech guy and he started saying NO...You don't understand...I told him I understood perfectly and thanked him again for letting me know about the "problem".  As I hung up I could still hear him saying NO, NO, You don't understand. I'm trying to help you!!