More than 300,000 people, including many in the US and UK, may have lost net access as the FBI shuts down servers used by cyber thieves.
The FBI seized the servers in November 2011 during raids to break up a hi-tech gang who used the DNS Changer virus to infect more than four million victims.
Victims’ web searches were routed through the servers so they saw adverts that led to the gang being paid.
Many machines still harbour the gang’s malicious code.
Read More: http://www.bbc.com/news/technology-18735228