14 DAY TRIAL // Google is leading a campaign to inform those with computers or routers infected with the DNSChanger malware, which tampers with the DNS settings to direct users malicious servers which redirect them to sites they never intended to see.
An estimate puts the number of those infected to some 500,000. While the fake DNS' have been shut down, the computers are still affected. Temporary DNS servers have been set up to provide those affected with DNS services, but those will be shut down in about a month and a half, leaving the devices infected with no working DNS configuration and so no internet connection.
Google will be notifying those infected via its sites, in their native languages, in the hopes of helping them repair their DNS configuration.
Google can't guarantee that all those infected will see the notifications - ISPs may be blocking the connection in some cases - or that the recommendations will work for everyone, but it should be of help in a lot of cases.