The FBI has pushed back the date for shutting down the DNS server which served the DNSChanger malware sites.  The FBI reports there are nearly 500,000 systems still infected and using the rogue DNS server. 

Network administrators should check their systems at https://forms.fbi.gov/check-to-see-if-your-computer-is-using-rogue-DNS to ensure they are not impacted.  Once the deadline of July 9th comes, any system using the rogue servers will be unable to access the internet until the malware has been removed and correct DNS settings are restored.

By the way...All you Mac users out there?  This affects you too!  Anti-malware software really is a necessity on all platforms.