Aug 7, 2014
A guy called (giving that number, 13474802300) with his telephone number suppressed, claiming and, well, "showing" that my PC were infected. Then he asked to call this website "www.infosis.net" to then start a program so that technical support could "repair" my PC.
Saying that I cannot trust them as I do not listed them as official Microsoft support partner, nor did I purchase Windows from their company, he then transferred me to his supervisor. He saw my point when I asked him whether he would leave a complete stranger into his home; so he promised to proof that he can clearly and uniquely identify my PC using the Windows registration number. OK... (I am still playing along.) He asked me to open the CMD prompt window, and to enter "ASSOC". Then looking for a line "zfsendtotarget; and he will tell me the large number I'd see there. Well, when I then told him that that is not a unique number but identical on all Vista and Windows7 PCs! (in case you want to know: zfsendtotarget is a part of the implementation of the 'Send to compressed (zipped) folder' option on the Explorer right-click context menu) Then the supervisor just hung up on me! Ohhhhh... ;-)