Someone infected with DNSChanger (which is fairly old) is quite likely to be infected with other malware as well. Perhaps being disconnected from the Internet is a good wake-up call for them to have their computers seen to.
Correction: this post has some misleading and incorrect information. While there really is a computer virus, the FBI *won't* check your computer for this virus. That's an impossible endeavor with the number of connected computers on the Internet. Also, the virus doesn't "goes off" on Monday.
Here's what's actually going on: the virus redirects your computer to a DNS server (this is the server that tells your computer where to go when you try to access an address like Glitch.com) ran by the virus's creators for malicious purposes. So if you type in Glitch.com, the virus creators could instead send you to a fake Glitch.com ran by them, for example. However, the FBI seized this server. But if they turn it off, infected people won't be able to access the Internet since their computers won't be able to find any sites. So, instead, they've been running a clean DNS server for the benefit of those infected while they try to get the information out about this virus and how to remove it.
But the FBI won't be running this server forever. On July 9th, they will turn it off, and then infected computers will be pointed to a DNS server that doesn't exist, so there'll be nowhere for them to get their information about where to find sites like Glitch.com, and so their Internet will effectively cease to work. That's what this alert's about.
It's not so much that they are checking your computer as it is the website aforementioned (dns-ok.us, which is controlled by the Internet Systems Consortium, not the United States Federal Bureau of Investigation) simply looks at the way you got there to figure out if you need to go through Door number 1 (Clean!) or Door number 2 (Hijacked!).
I'd rather have pointed people to the DCWG page here: http://www.dcwg.org/ to skip all the spin that gets added to a Public Relations article.
I'm going to go hunker down in a bunker here and get ready to take calls tomorrow from wonderful people who would rather live with a malware infection on their system than clean it off because it's too hard to do.
Xial, I understand what has happened (and I've already confirmed weeks ago that I'm not infected) - it's merely that the post sounds as if the FBI actively searches people's computers and then disconnects them from the internet (presumably by targetting each individual user), which is clearly not what is happening - if things were as they were presented in the post, I'd be about as worried about the FBI's actions as about the infection itself.
Gee. Chill out. There was no "critical nastiness", none whatsoever: there were people correcting the article / clarifying what is actually going on. More and correct info is good, no?
The people that will be affected by this are affected by this because they listened to a webpage telling them "you're computer is infected, click here to clean up". The best action towards those people is not "omfg the FBI might shut your internet down: click here to fix it", because that's what ever fake virus warning does. The best action is give clear and detailed info on what's going on: yet you get offended that people dared give that info as a supplement to your warning.