If your computer crashes then you need to restore your device. Norton Antivirus is very necessary software to prevent your computer from virus and online threats. It provides security to your computer from unauthorized access and increase the security of your device.
Once you recovered your system you need to reinstall Norton Setup on your device. To reinstall Norton, you are required to obtain your product key. You can get your product key by accessing your Norton account on its official website. Once you got your product key then you need to go through below mentioned steps to reinstall Norton.

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