Envoie de mails virus à mes contacts

Bonjour,

Hier ma boite mail, hotmail, a envoyé ce mail à tous mes contacts mais pas seulement mes contacts msn, tous les contacts enregistrés!:

Dear,
Wish you enjoy a great day!
This is an electronic company from Huahao Electronic Co., Ltd. We are now launching a new marketing campaign, some of our products are special offer. What's more, we can give you the best price for the products that you are seeking for.
We mainly sell electrical products,such as laptop, lcd tv, camera
,mobile,Mp4, GPS,and so on.What you need to do is just sending us your detailed inquire or order. We can offer the high quality and competitive price, and all the products come with international warranty.
It will be a great start , and we Sincerely hope we can build friendship of trade relation in the future!
It's our pleasure to hear from you.
Best regards,
taotao

Je pense que c'est un virus ou quelque chose dans le genre, mais j'aimerais bien savoir si il y a quelque chose à faire pour éviter que ça recommence

Merci d'avance pour vos réponses