Hundreds of thousands of computer users infected by the DNSChanger computer virus could lose Internet access on Monday.
The Huffington Post reported in April that the problem began when international hackers ran an online advertising scam to take control of infected computers.
The FBI responded with a safety net using government computers to prevent Internet disruptions.
"But that safety net is going offline next Monday meaning that anyone who is still infected with the virus will lose access to the Internet unless they remove it from their machine," writes Hayley Tsukayama in the Washington Post.
To find out whether a computer is infected, U.S. users can run a simple online test at www.dns-ok.us.
The problem arises during the process of shutting down the computer. Once the shutdown is complete, computers infected by DNSChanger could lose access to the Internet on Monday.
According to CBS News, about 277,000 computers worldwide—64,000 of them in the United States—could still be infected.
After Monday, any computers still infected will not be able to access the Internet.