at least once a week for the past four weeks I have been getting calls from a young man with an :Indian:accent about my computer.He claims to be from Windows and says my PC has picked up some Malware which is slowing it down.He asked me each time to log on and he would direct me how to get rid of this Malware( which I refused to do).As I already have defences against Malware etc.I am puzzled. Is this some kind of con job to get access to my details or to my PC.Has anyone had a similar experience?.Advise would be appreciated.