How to remove GRV?

The steps to remove this type of virus are as follows:

• Completely scan your computer with a good quality, highly defined anti-virus or anti-malware software. 
• Check your host files for malicious entries which reside in C:\Windows\System32\Drivers\etc\hosts. 
• Open the host file with notepad and delete lines of codes and IPs which rewrite Google or Microsoft sub domains. 
• Check Domain Name Server (DNS) setting and in internet protocol settings tick the check box “Obtain DNS server address automatically”. 
• Check proxy setting on internet browser and enter parameters that were given by system administrator. 
• Please, uninstall all the suspicious add-ons and extensions of your browsers. 
• Click Uncheck to all the “Hide protected operating system files (Recommended)” and then click apply to save these changes. 

The best precaution which you should take to overcome this virus is that stop visiting websites which are provides irrelevant software’s. Properly judge the site by seeing its rating and authentication before clicking to it. Properly read terms and conditions before installing software.