Please go to the following site to check your computers security: http://www.dns-ok.us/
The FBI has recently created this site in the hopes to counter the malware program known as DNSChanger which blackouts your internet and directs you to malicious sites that could further damage your computer. If you visit this site and it's logo has a green background, just do a normal security scan. If it is a red logo, however, take advanced measures to have the DNSChanger removed and any further viruses extracted as well.
I warn all of you Mac users as well. Apple was completely knocked out this morning due the virus. They came back up about 11:30am and have updated their site with the same DNS Security checker that's on the site I linked to above. Please don't be so confident in your computers!
I hope this has been very informative to most of you, and hope that you all have safe computers.