Others 24.3 percent

Most unsolicited e-mails are now sent from zombie PCs -- computers infected with Trojans, worms and viruses that turn them into spam-spewing bots, says Brett Myroff, CEO of master Sophos distributor, NetXactics. 'In the past, hackers relied on operating system vulnerabilities to convert innocent computers into zombies. Now, they are turning back to malware to trick users into running their malicious code, and opening the backdoor to hackers.' Hundreds of new versions of the Stratio worm have helped steadily increase the volume of spam seen travelling across the 'Net.