This is a computer-security problem more likely to affect families with kids and tweens – especially young file-sharers (high school students are a bit old for "High School Musical"). If fans of Disney's High School Musical series uses P2P networks such as eMule or eDonkey, they need to be especially alert, CNET reports. It cites a report from Panda Security that warns of Trojan software called VB.ADQ or Agent.KGR, as well as "the adware Koolbar, that's circulating around those file-sharing networks. Pay attention to the file extension before you download any file that looks like a tune or clip from the series. "Many of the malicious files have the extension '.exe'," which is "rarely the case with a legitimate music or video file," CNET reports.