Worm.Explore.Zip (Pack) Virus Alert 
Microsoft has learned that a variant of the Worm.Explore.Zip virus, originally introduced in June 1999, has recently affected a number of computer users and companies. As with all virus issues, Microsoft takes this issue very seriously. We are currently working with the anti-virus community to ensure that customers are educated on the situation and receive the appropriate tools to protect themselves. Because of the widespread and malicious nature of this particular virus, Microsoft is taking steps to proactively notify our customers to help minimize its impact.
What is the Worm.Explore.Zip (Pack) Virus?
The Worm.Explore.Zip (Pack) virus is sent by means of an e-mail attachment with the file name "zipped_files.exe." Opening this attachment will run the virus and may affect data on your hard disk drive(s), as well as any mapped network drives each time it is executed. It is important to note that the Worm.Explore.Zip virus does not execute automatically.
The infected e-mail may appear to come from an acquaintance, and the subject line of the message varies due to the fact that the virus spreads by replying to an e-mail message sent to the affected user. The message body of the attachment reads, "I received your email and I shall send you a reply ASAP. Till then, take a look at the attached zipped docs."
What should I do if I receive this virus?
If you receive this e-mail message you should delete it immediately without opening the attachment, and then empty your Deleted Items folder.
Who can the virus affect?
This virus can affect your machine if you are using Microsoft Outlook® or Outlook Express, running on Microsoft Windows® 95, Windows 98, or Windows NT®.
How do I ensure I will not be infected?
- Install the latest anti-virus software and keep your digital signatures up to date.
- To receive a warning before attachments run, make sure that you have attachment security set to high within the Outlook security settings.
- Microsoft recommends that you install an update to the Outlook e-mail attachment security to increase protection against viruses such as this one. Consult the E-mail Attachment Virus Alert for links to this update.
- Do not open unknown e-mail attachments.
Additional Information
Consult the following anti-virus software sites for available fixes for the Worm.Explore.Zip (Pack) virus:
