"The Minneapolis-based company, which filters corporate e-mail for spam and viruses, intercepts about 27 spam messages a second today, up from two per second at the same time last year. Sixty-six percent of those messages are generated from PCs that have been taken over by spammers without the knowledge of the computers' owners, Mark Sunner, chief technology officer for MessageLabs, said.
Emphasis my own.
http://www.securityp...icleId=16600263