I moved this from Community Help to Malware Discussion for better attention.
It's unfortunate but no antivirus software is 100% guaranteed. To avoid infection surf very carefully, take care what you download and who you connect with and always keep all aspects of your system up to date, even parts you may not use, such as IE if you use another browser for instance.
If you want McAfee themselves to help you with this it'll be expensive because, like all antivirus makers, they charge for professional virus/malware removal as per THIS page.
First free suggestion, try System Restore to before all this happened. If you can't get to that in regular mode it can be initiated in Safe Mode.
If that doesn't work or if you want to make sure you are OK try running Stinger and Malwarebytes Free, both in that last link in my signature below.
If those fail, run Hijackthis and post its log as per the intructions lower down on that same link.
Sometimes you have to listen to what blogs say. Just be sure you trust the blog.
By the way the installers can be loaded using another machine on a flash drive if need be.