The Klez virus/worm was amazingly successful last month. Kaspersky Labs has just issued a Top 10 for April that suggests it is, er, more popular than Sophos's figures show (below): I-Worm.Klez 94,5 % I-Worm.BadtransII 1,5 % Win32.Elkern.c 0,6 % I-Worm.Sircam 0,6 % I-Worm.HappyTime 0,4 % I-Worm.LoveLetter 0,3 % I-Worm.Hybris 0,2 % Win95.CIH 0,2 % I-Worm.Cervivec 0,2 % Trojan.PSW.Delf 0,1 %