A "Trojan Horse" virus is rapidly spreading through e-mail services, especially those using Outlook Express.

E-mails that have the words "Prettypark.exe" in the subject line contain the virus. On Monday it attached itself to one computer at NashvillePost.com, despite the presence of a McAfee anti-virus program updated as recently as two weeks ago.

The e-mail address book that was infected was NOT one used for subscribers to NashvillePost.com.

The virus causes an e-mail message to be sent to all listings in recipients' address books.

The following information is from the Newtork Associates webpage: "This worm will try to email itself automatically every 30 minutes to all email addresses listed in the Windows address book associated with Outlook Express."

"A second function of this worm is that it will also try to connect to an IRC server and join a specific IRC channel. While connected, this worm tries to stay connected by sending information to the IRC server, and will also retrieve any commands from the IRC channel. While on the determined IRC server, the author of this worm could use the connection as a remote access trojan in order to get information such as the computer name, registered owner, registered organization, system root path, and Dial Up Networking username and passwords."

To read information to remove the virus, go to http://www.symantec.com/avcenter/venc/data/prettypark.worm.html or click here.