Only one new threat, Mytob-Z, broke into the top 10 in April, making its debut at No. 7. "During the month of April, several older viruses maintained their spot on the chart," Gregg Mastoras ...

In 2011, more than 317 million new pieces of malware – computer viruses and other malicious software – were created. "Because of the extra time and resources required to secure the computers, MyDoom ...