Called and said my computer was sending out warning messages. It was infected with a virus and they would fix it. Tried to get me to check the error register to convince me the problem existed. This wasn't my first intrusion. I told him the real problem was he was trying to get me to download a program that would kidnap my PC, then charge me to get it back. He called me a few choice words. I responded in kind and told him about my history with his mother, then hung up.
Had these calls before. Different number, same accent.