The latest report does not include data on the zero-day vulnerability in Internet Explorer that Microsoft released an emergency patch for on Monday. The flaw, which affects IE 6 through IE 11, could allow attackers to execute code remotely on a compromised computer if the user views an infected web page using the browser.
Rains said "time will tell" if its next report shows a rise in infections due to the bug. But Microsoft believes the quick release of a patch and fact users have to be lured to a malicious website mitigates the risk.
"I don't think we will see an uptick [in infections] given the quick response and the type of vulnerability that is," Rains said.
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