Mail envoyé sans mon accord

Bonjour,

Mon ordinateur via hotmail, a envoyé pour la deuxième fois un mail que je n'ai pas écrit il vient d'une société : www.Ebestcargo.com. Est ce du à un virus comment font-il ca, est grave? Voici la mail :

Hello.
we are an electronical wholesale company which located in China. we mainly focuses on the selling of electronics ,
such as digital cameras, mobile, LCD TV, Laptops Notebooks, Digital Video, Mp4, GPS, and so on. .
In order to gratulate Olympic Games of 2008years in China. our company have a favourable campaign;
We can offer you both high quality products and good price; There is a large free market for you to purchase freely.
This is a god-given chance. we hope you can hold it quickly
site: www.Ebestcargo.com ;
E-mail: Ebestcargo@yahoo.com.cn ;
MSN: Ebestcargo@hotmail.com ;

Merci de votre aide