Norton Family Time Limits Not Working on PC

The Norton Family product has never consistently enforced time limits on my daughter's computer.  I have contacted support multiple times, removed all Norton products and reinstalled, upgraded operating systems, and done nearly everything else imaginable to get it to work but to no avail.  Today she was on the computer for 3.75 hours despite having a limit of 2.  I would like a DEFINITIVE SOLUTION to this problem or I will cancel as this is a waste of time and money trying to solve at this point.  Please advise!!

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