Websearch.Ask.com - Is this a problem site?

I noticed Websearch.Ask.com was coming up as site visited on our daughters computer. I figured it was for school but when I searched for it - this message was across the top of screen - Sorry, the page you were looking for does not exist or is not available. We performed a web search for “Web Search Ask” and here's what we found. When I did more searching I saw people refer to it as a dangerous malware. What is it?