Received a cold call stating that they (who are they?) received notice I had a trojan and it was going to cause my computer to crash and that it had damaged my firewall so that my anti-virus was not longer working. When I questioned who they were (heavy Indian accent) they claimed they were a company (couldn't understand the name) and the caller was from South Africa. He wanted me to check my registration number to verify that he was legitimate by typing in a command "assoc" and looking for the 12 digit number he gave me. He gave me his email as firstname.lastname@example.org and a phone number 5005252818 as the cust service number. I put him off by saying I wanted to check this out on my own and I would contact him if I was satisfied he was on the level. Looks like I was correct in my suspicions.