Received phone call from the "Service Centre of the Windows Operating System". West-asian gentleman by the name of "Steve". Said my PC was sending them error messages. I have had a number of calls from these people over the past six months but today I spent 10 minutes on the phone to them to see where it would lead. They had a structured plan for taking me through my PC event log and browser log. After working me through this they asked me to share my PC with one of their technicians who would "clean up the PC and make it run faster". Thats when I bailed out of the call. I work with computers and all of this sounded distinctly underhand to me. I challenged him a couple of times during the call. The address he provided me was 92 Acre Lane Brixton SW2 5QN. Next time I am going past I am going to check it out.