To start using Norton antivirus, visit norton.com/setup and enter Norton setup product key and activate your Norton subscription. Norton product key is a 25-character alpha-numeric code written on the back of a retail card or user can found it in the registered email id. It's used to verify Norton security at www.norton.com/setup. As a sample product key to let you understand: xxxxx-xxxxx-xxxxx-xxxxx-xxxxx.
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