Worms and viruses will use any available channel to spread, as recipients of infected email attachments, visitors to websites loaded with malicious software and users of peer-to-peer networks can all testify.
And users from those three countries were also the most likely to engage in other risky behavior on work PCs, including reading personal e-mail, downloading music and video and even peer-to-peer file-sharing, a practice that often spreads malicious software or inadvertently gives outsiders access to sensitive documents.