"If it is free, then it is shareware files and they are not safe.."
Bull ! Just because something is free or shareware does NOT mean it is malware infected.
Sure, there are lots of infected 'warez' on the internet, but there are infected 'sites' too... whatever you download, scan *first* before installation/use. Even better, use Web of Trust (WOT) to help stay clear of suspicious sites, or Sandboxie to stay safer while surfing or installing...
But I find your blanket statement totally off the mark, as MANY free and shareware files are legitimate, safe alternatives.