how to remove gnoosi.net browser hijack virus?

how to remove gnoosi.net browser hijack virus?
gnoosi.net is a home page hijacker that promotes its own search engine. It arrives on the computer through various ways that attacker may use to get installed without user’s knowledge. Primarily, gnoosi.net is using freeware and shareware to spread a copy and embed the code to known browsers like Internet Explorer, Mozilla Firefox, and Google Chrome.
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