Zombie rankings for second half 2004: UK – 25.2%, USA – 24.6%, China – 7.8%

In the second half of 2004, Symantec tracked the number of computers that have been compromised by malicious software. 25.2% of all compromised computers the company discovered were based in the UK, with the US following closely behind with 24.6%, and China in third with 7.8%. In July 2004 Symantec was finding an average of 30,000 new compromised PCs each day, which fell to 5,000 per day by December.