Is there any software that lets me download free music minus the viruses,worms or malware risk?
With P2P software or browsing the web downloading files there is always a risk for malware. You could avoid this by simply not using P2P software and downloading files of unknown safety. If however you really must then you should get good security software. AntiVir free has one of the best detection rates, even better than most paid antiviruses, and is very light on resources. To increase zero day protection you can get ThreatFire or Prevx Edge (not both), they are essential in complementing your antivirus. ThreatFire: http://www.threatfire.com/ Prevx: http://www.prevx.com/freescan.