A judge initially signed off on this arrangement until March 8 in order to give ISPs sufficient time to identify and notify victims. However, the deadline was later extended by four months.

The replacement servers are now scheduled to be taken offline on July 9, after which time computers still infected with the DNSChanger malware will no longer be able to access the Internet.

The DNSChanger Working Group estimates that there are over 350,000 devices still infected with DNSChanger, out of the 4 million that were originally affected by the malware.

Facebook's decision to notify the owners of the remaining infected computers follows a similar decision by Google, which started alerting DNSChanger victims through its search pages on May 22.