ARCHIVED: What does it mean if I receive a message from Microsoft Forefront telling me that I have an ExceedinglyNested virus?

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ExceedinglyNested is not an actual virus. Rather, it is a term that Microsoft Forefront uses to flag content in email messages that may be virus-like, but which doesn't directly match any known viruses. The flagged content may be fragments of a virus, or an attachment which resembles a virus, but is not actually a complete known virus.

If you receive this message, you should make sure that you have updated your virus patterns and scanned your computer for virus infections.