First of all, you should know google redirect virus is not an exact virus. It is a type of programming or toolbar for search.
Google always provides search result and make revenue from it. If someone gives user search to google, google gives the small part of the revenue to that traffic generator. Here comes search engines and toolbars like as Babylon, Delta, Snap.do, iLivid, Ask toolbar, Yahoo, Bing and many more. These toolbars earn money by providing result according to the user by paid advertisements.
Google has the maximum traffic on the internet due to the accurate search result. These toolbars change default search to their own search very smartly. Once you will search, it provides you a specific decided result and always redirect to ads result. This is called google redirect.
When it installed on your computer gives lots of small ads, tabs or pop up ads on your browser. Its very irritating and freezes your browser too slow.
Google redirects mostly installed with the different software. Nowadays many software setups are available on internet which contains more than many setups in hidden.
Every software has EULA (End User Licence Agreement) appeared to be legitimate and useful software. Once you accept that it allows installing a bundle of software and toolbars under single setup. This way you gives permission to install unwittingly and unrelated software. Most of the antivirus pretend as virus and block them.
For Internet explorer-Open Internet Explorer and go to Tools, Internet Options. Type http://www.google.com/ in the field for your home page and click Ok.
For Google Chrome – Google Chrome, click the three verticals dots icon in the top right-hand corner of the screen. Go to Settings, and then scroll down to ‘Search engine’ and Open manage search engine. Here select default search engine http://www.google.com/.
For Mozilla Firefox-In Firefox, click the three horizontal lines icon in the top right-hand corner of the window. Choose Options. Then select General, and the option selected is ‘Show my Home Page’. Then in the ‘Home Page:’ field below insert http://www.google.com/ and that will be your home page.