Google on Tuesday hauled out a tool it last used nearly a year ago to warn users infected with the “DNSChanger” malware.

Starting Tuesday, special messages will be displayed at the top of a Google search results page to people whose Windows PCs and Macs have been infected with malicious code that hijacks their clicks.

“Our goal with this notification is to raise awareness of DNSChanger among affected users,” said Damian Menscher, a Google security engineer, in a post to a¬†company blog. “We believe directly messaging affected users on a trusted site and in their preferred language will produce the best possible results.”

One security expert appreciated Google’s effort.

Google Warns Users Infected with DNSChanger

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