If you keep receiving the Google Custom Search when you open the web-browser, it could mean your PC is infected with a malware from the web-browser hijacker family. Once installed, it will make a changes to the Chrome, Firefox, IE and MS Edge’s settings. So, every time, when you will open the internet browser, it will began to display Google Custom Search annoying homepage instead of your startpage. Moreover, this malware may block an option to restore your startpage.
The Custom Search hijacker can change the settings of the Chrome, Firefox, IE and MS Edge, but often that a parasites like this can also infect all types of web-browsers by changing their desktop shortcuts. Thus forcing the user each time run the web-browser to see Google Custom Search annoying web-page.
When your computer is infected, every time you launch your web-browser you will see this web-page. Of course you can setup your start page again, but next time you open a browser you will see that Google Custom Search homepage return. As mentioned above, the hijacker may change the default search engine on this unwanted web site too, so all your search queries will be redirected to Google Custom Search. Thus the authors of the browser hijacker infection may collect the search terms of your queries, and redirect you to malicious web-sites.
The Custom Search infection is not a virus, but the virus behaves similarly. As a rootkit hides in the system, modifies internet browser settings, and blocks them from changing. Also this browser hijacker can install additional web-browser addons, extensions and modules that will display advertisements and popups. And finally, the Custom Search infection can collect a wide variety of personal information such as what web-pages you are opening, what you are looking for the World Wide Web and so on. This information, in the future, may be transferred to third parties. Therefore it is very important to as quickly as possible to clean your PC, remove ‘Custom Search’ redirect , as well as other malicious and ad-supported software, which could penetrate the PC system along with it.
How to Google Custom Search browser hijacker get installed onto personal computer
Disregarding the basic computer security practices such as no antivirus software installed, installation of unknown applications and freeware which may be bundled with hijacker infection, as well as computer virus infection – these are the possible causes of browser redirect. Moreover, random visits to an unknown and untrusted web-sites, when you click on the search results from Google (Yahoo, Bing) or links on the Internet, when the PC is not protected with a software that may block access to malicious sites, it can also lead to the fact that instead of your home page, the internet browser will be redirected to ‘Google Custom Search’ startpage or other unwanted sites.
Remove Google Custom Search from Google Chrome
Open the Google Chrome menu by clicking on the button in the form of three horizontal stripes (
). It opens the drop-down menu. Click to Settings option.
). It opens the drop-down menu. Click to Settings option.
Scroll down to the bottom of the page and click on the “Show advanced settings” link. Now scroll down until the Reset settings section is visible, as shown below and click on the Reset settings button.
Confirm your action, click on the Reset button.
Get rid of Google Custom Search startpage in Firefox
Open the Mozilla Firefox menu by clicking on the button in the form of three horizontal stripes (). It opens the drop-down menu. Click on the Help button (
).
). It opens the drop-down menu. Click on the Help button (). 
In the Help menu click on the “Troubleshooting Information”. In the upper-right corner of the “Troubleshooting Information” page click on “Refresh Firefox” button.
Confirm your action. Click on the “Refresh Firefox”.
Get rid of Custom Search search in IE
To restore the home page, new tab page and search provider by default you need to reset the Microsoft Internet Explorer’s settings to the state, they were when the Windows OS was first installed on your system.
Launch the Microsoft Internet Explorer. Open the Tools menu (click ‘gear’ icon 
). It shows the drop-down menu on the right part of the web-browser, then click the “Internet Options”.
). It shows the drop-down menu on the right part of the web-browser, then click the “Internet Options”.
In the “Internet Options” dialog screen, you need to click on the “Advanced” tab, then press the “Reset” button. The IE will display the “Reset Internet Explorer settings” dialog box. Click on the “Delete personal settings” check box to select it. Next press the “Reset” button.
Once the task is done, click “Close” button, then close the Internet Explorer. Restart your computer for the changes to take effect. This step will help you to back your browser’s home page, newtab page and search provider by default to default state.