Why would you open attachments from people you didn't even know anyways? Besides Hotmail's virus checker will not detect all viruses.
Anyways I received this virus today, and it was titled "reves" and had the following message:
Hola como estas ?
Te mando este archivo para que me des tu punto de vista
Nos vemos pronto, gracias.
And with a attached zip file that was like 145 KB. No way was I gonna open something a spanish person sent me...
