In case you havne't seen it yet.  Looks like the virus spreaders are doing their best to wreck your computer, and now they want to do it through ZIP files. 

Microsoft Consumer Virus Alert:

Why We Are Issuing This Alert

W32/Mydoom@MM spreads through e-mail. This worm can disguise the sender's address, a tactic known as spoofing, and may generate e-mails that appear to have been sent by Microsoft. Many of the addresses Mydoom uses are valid addresses that are being spoofed for malicious purposes.

Mydoom Virus Alert: What to Do

Treat all e-mail attachments with caution, particularly .zip files in the case of this virus, even if they appear to be from a trusted source. Learn what to do about virus infections. http://www.microsoft.com/security/antivirus/mydoom.asp

Complete Information: http://www.microsoft.com/security/antivirus/mydoom.asp