See these threads about searchqu:

• /questions/816181
• /questions/790833

searchqu virus manual removal: http://blog.teesupport.com/how-to-remove-searchqu-virus-searchqu-manual-removal-instructions/

Hi, My name is John, and I'm a member of the Searchqu Support Team. I'm here to help :) When iLivid installs onto your pc it offered two basic installs, typical installation, which lists the add-on features such as searchqu default search, and Custom installation, which allows you to select the add-ons that you wish to install. There's no need to worry if you did the typical install - this isn't a virus, nor malware, and there's no need to Perform a virus scan against it.

Since Searchqu is an addon feature of iLivid, there's no need to uninstall iLivid http://www.iLivid.com, the iLivid Download Manager will work just fine without it :-)

In order to remove the searchqu default search please check: http://www.ilivid.com/faq.htm

look for the paragraph  : " I would like to keep iLivid, but change my default search engine" 

In case of any further questions please don't hesitate to ask,we are here to assist The Searchqu support team.