Save your computer from Facebook virus

Since last week I am getting the email from Facebook that includes below message.

Subject: [virus Win32/Oficla.DI trojan] Facebook Password Reset Confirmation! Customer Message.
From: support@facebook.com

Dear user of facebook,

Because of the measures taken to provide safety to our clients, your password has been changed.
You can find your new password in attached document.

Thanks,
Your Facebook.

Such emails have an attachment of .zip file, if I want to try to save it or to download it it shows virus alert. First of all I think that it might be true as it looked genuine, but when I tried to open and save the attachment and tried to reset my password it showed a virus alert.
Steps to keep your computer safe from Facebook (and other) Virus.
• If you want to reset your password indeed don’t click any link of such kind of emails that ask for the confirmation.
• Please don’t try to download any attachment; especially any .zip file. However, either Facebook or any other website does not send us any attachment to reset our password.
• Kindly use latest version of Mozilla Firefox and Google Chrome browser.
• Use PhishTank website to check if you suspect any website.
That’s it for the moment!