Nearly 1 in 5 enterprises have had workers’ PCs infected with keyloggers, the worst kind of spyware, a survey released Monday said. The poll, conducted by Harris Interactive for San Diego-based security vendor Websense, found that 17 percent of IT administrators said that one or more employees had launched a keylogger on their network. In last year’s survey, only 12 percent of administrators had acknowledged that keyloggers infected their domains. Full Story