System infected with DNS changer malware will have no interenet access starting this Monday.
The FBI has shutdown those rogue DNS servers and replace them with legit one so infected system will not get
interrupted, but the legit servers have a time limit.
Staring Monday the FBI will take those legit DNS servers offline and that's when infected PCs will no longer have
access to the internet.
Any system infected with this malware needs to run a virus and malware scan before the Monday deadline.
To check if your system is infected or not visit.
FBI (pdf)
http://www.fbi.gov/news/stories/2011/november/malware_110911/DNS-changer-malware.pdf
FBI article
http://www.fbi.gov/news/stories/2011/november/malware_110911