Conficker Worm: 30% Still Infected


Last updated on: September 7, 2020

Qualys estimates that about 30 percent of Windows-based computers remain vulnerable to infection because they have not been updated with the patch.


In December 2008, Qualys' customers performed scans on over 9 Million IP addresses. There is some duplication as some customers scan multiple times in a given month, but the majority of customers are on a 30 day cycle in their scan schedules. The majority of these scans are against Windows machines as they are the most prevalent in our customers' networks. It is safe to say that data is based on Millions of IP addresses scanned.

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