Sounds like it could of been spam, but it could also contain Malware...
You should get rid of those files and do a system scan with your antivirus and spyware apps...
Here are a list of free ones that are excellent...
http://www.gnutellaforums.com/showpo...24&postcount=2
You also need to be really careful with the files you download, always check their sizes and file formats....
What you should know about WMA Files WARNING: Viruses on network you should be aware of!