Ok so if someone calls you and says they are from Microsoft and they have detected problems from your computer, there are a few things to know. First of all they are not from Microsoft. Microsoft would never call you at home or on your cell. Do no give them access to your computer. If you have already given them access then The first step of the scam is to show you an error log with errors on it. Every computer in the world has an error log with errors on it. They then will act as if you have many security problems and will install protection. They will install there own junk which will do you no good at all.