URL:Mal ppcclickfeed.com

Please help me with my computer virus problem. Each time I run a search on Google, Bing, and Yahoo, my Avast antivirus warns me of possible URL:Mal ppcclickfeed.com. The warning pop-up started yesterday and until now, I cannot find a way to solve it.

Why does it warn of URL:Mal ppcclickfeed.com even though I am not visiting the said address? As said, I am doing a legitimate search from popular search engine. While viewing the logs of Avast, I notice that the virus points my browser to a random URL like http://13.ppcclickfeed.com, or http://16. ppcclickfeed.com.

Please help me solve this problem. Help me remove URL:Mal ppcclickfeed.com from the computer.

Thanks and God bless,