So, that virus which slowed your computer to a crawl? Yeah, that was probably your fault. Microsoft says nearly half of all computer malware &amp;#8211; viruses, worms, trojans, adware, etc. &amp;#8211; can&amp;#8217;t infect your computer without some sort of user interaction. In the first six months of 2011, 44.8 percent of malware detected by Microsoft&amp;#8217;s [...]