How can i get rid of this Virus?

So I figured there is a virus on my computer from my previous post. >http://answers.yahoo.com/question/index?qid=20130209165927AAWEfgL How do I get rid of it? Every time I try to go on avast my computer blue screens and it has to restart...

The problem which I have faced many times. This happens due to some advertisements or programmes installs automatically, when you click on any Ad. In other way if you are trying to download the songs from a website, some ads seems to same like as you need to click on download button some ads keeps appearing with download button. Mistakenly we will kick on the download button (in which the download button related to Ad) automatically the software is downloaded and installs into system and browser and after sometime it crashes automatically.

There is option to remove these kinds of unnecessary softwares. go to control panel find the unnecessary software or find the software which you didn't installed and select the programmes uninstall them. 

Goto your browser settings, Reset all the browser settings, make sure that some browsers don't have this option you many need to follow the help guide. If not done clearly uninstall the browser and install the same.

If you connected to Internet don't install the anti virus, Install the Internet security. That is best option for you. Try Internet security features by installing a Trial software from Norton. Update the virus definitions and scan the whole systems. Beware of Ad wares and Mal wares.