Should I open an email from Microsoft support?

Virus! Go to antivirus.com & read about it in the list of new viruses and immediately update your antirvirus software.

I received an email from support@microsoft.com and it came with an attached file which showed nothing. How can I view that file? (Bhaskar Ghosh)

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Virus! Go to antivirus.com, or the website of your favourite antivirus software, read about it in the list of new viruses, and immediately update your antirvirus software.