I have a not-yet-activated "Norton Security with Backup 10-user key that is valid for one year." But have 1.5 years of NIS left. Will the NS key still be valid in 1.5 years? Or have key activation time-limits been added with NS? if so, what are they? ("Valid for one year" wouldn't possibly mean it has to be *activated* in less than one year from now, would it?)