While listening to music on MySpace, I came back to my computer a little while later to see misleading messages generated by myspace (or their advertisers) suggesting that I had viruses on my machine… This type of malware is known as scareware, and is a complete scam. On average, we remove 1-3 scareware “infections” a week from customer machines.
Read more about how to protect yourself here:
http://www.symantec.com/norton/theme.jsp?themeid=mislead [1]