I would like to preface this first, with an opinion. I don't feel the FBI will flip a switch and disconnect peoples internet access. They probably will come up with a better solution that will resolve this. BUT, I wouldn't want the be the one that didn't correct it, or suggest that others do the same. There is a definite risk of losing all internet access on your computer.
To begin, this is real, and everyone needs to check and be certain before July 7th, that you are not one of millions with an issue. If you haven't heard of this, your not alone. A "malware" that has infected nearly 4 million computers has created a big issue. The FBI recently completed an investigation that ended with 6 Serbians and one Russian arrested, and charged with wire fraud and computer intrusion crimes.
What this means to you?
If you happen to be infected, when the FBI removes these "DNS" servers, your computer will no longer be able to access the internet. Without being overly complicated, DNS servers translate the name of a website into it's I.P. address, which the internet requires to get you to the place you are looking for.
So now you ask,
"How will I know?" The easiest way to tell is to visit this site, www.dns-ok.us, and it will tell you. It is almost overly simple because all it does is either show up as green, meaning you are ok, or red, meaning you are infected.
If you know how to check your dns settings, make sure they are correct, and not set to one of these.
85.255.112.0 through 85.255.127.255
67.210.0.0 through 67.210.15.255
93.188.160.0 through 93.188.167.255
77.67.83.0 through 77.67.83.255
213.109.64.0 through 213.109.79.255
64.28.176.0 through 64.28.191.255
Refer to the following Tech Republic blog for more detailed information.
http://m.techrepublic.com/blog/security/preparing-for-the-dnschanger-internet-outage/7863?tag=nl.e036
As a note, it is absolutely critical to make sure your computer has current antivirus, and malware protection. Fifty percent of all hacking/intrusion crimes are targeting small businesses. If you are a small business owner this does mean you.