qwant.com is believed to be a browser hijacker that can install without your authorization. Browser hijackers are usually not voluntarily installed by users, they may not even be aware of the contamination. Redirect viruses travel via free programs, and this is called packaging. No need to worry about the browser hijacker doing direct damage to your computer as it's not believed to be malware. You will, however, experience continuous redirects to sponsored sites, as that is why they even exist. Those pages aren't always not dangerous so bear in mind that if you were to get rerouted to a website that is not secure you might end up authorizing a much more severe risk to infect your machine. You will gain nothing by keeping the hijacker. To go back to usual surfing, you will need to eliminate qwant.com.
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