Logging on to the internet Monday morning maybe a problem for tens of thousands of US computer users.
It all began months ago, when six estonians were charged with corrupting four millioncomputers worldwide with mal-ware.
The virus essentially hijacked computers, forcing it to use internet servers that often directed the user to sites they may not have intended.
The scammers made as much as $14 million off ads they'd sold on the destination sites.
"They had found a way to tap into one of the most lucrative sources of money on the internet, and that's online advertising," said Tom Grasso, FBI.
After the scammers were caught the FBI took over their servers allowing users to surf without issue for months.
But now after numerous warnings the FBI is pulling the plug, essentially disconnecting an estimated 45,000 infected devices.
"The good news is, the odds aren't very high that you will be infected," said Bob Sullivan, a MSNBC technology writer.
"But the bad news is, if you are infected, you probably don't know. And on monday, if your internet goes out, you're going to have a really hard time fixing your computer."
There is a way to see if your computer has the virus.
Log on to www.dcwg.org. The website will tell you immediately if your computer has the virus and how to fix it.
It's a simple test, that can save you from a lot of potential problems.