Some virus pranksters are sending out email containing the following message:
Klez.H is the most common world-wide spreading worm.It’s very dangerous by corrupting your files.
Because of its very smart stealth and anti-anti-virus technic,most common AV software can’t detect or clean it.
We developed this free immunity tool to defeat the malicious virus.
You only need to run this tool once,and then Klez will never come into your PC
These messages have an attachment that supposedly removes the Klez or ElKern virus. To give the message some extra credibility, the senders have forged the mail headers so that they appear to come from a legitimate-sounding email address such as av_patch@norton.com or av_patch@mcafee.com.
If you get email like this, delete it immediately. You should not — under any circumstances — run the attached file. It does not contain any anti-virus software; it probably contains the virus that you are told it protects against.