Before installing full version of Net Protector Antivirus, please remove any other Antivirus Software on your PC otherwise your computer may hang or freeze. Netprotector Total Security Key ( you can use for new or renewal ) Download Netprotector setup from https://www.npav.net/downloads OR https://www.indiaantivirus.com/downloadfullversion.asp Run the setup --> click on next – click on install ? Enter the key purchased from storeantivirus.com ? Fill the form & activate on line