<A HREF="http://news.zdnet.com/2100-1009_22-6010163.html?tag=zdnn.alert">A virus masquerading as a new beta version</A> of Microsoft's MSN Messenger has begun circulating, antivirus company F-Secure said on its blog Tuesday. The virus, which F-Secure calls Virkel.F, comes as a file called BETA8WEBINSTALL.EXE that can be downloaded from a Web site. Running the program installs not a new MSN Messenger beta, but rather a virus that sends download links to a computer user's MSN Messenger buddies. The virus falsely labels the link as "MSN Messenger 8 Working BETA."