I have a full copy that came with the computer and it says I have 400 something days left in my subscription, so I doubt that is the problem.
I'm not saying that's "the problem". I'm saying it's a reason not to use it, because in about 13 months it'll be useless to you anyway.
To support this, you wouldn't believe the number of laptops I've had to de-malware because the laptop is now just over 3 months/12 months/however-long old and its inbuilt McAfee/Symantec/Bullguard/whatever AV solution expired in the last week or so, but the owner ignored the pleas (pretty obvious and annoying ones[1]) to buy a licence and suddenly[2] found themselves with Problems of some kind or another. (Not that I particularly like McAfee or Symantec, in the first place, but that's a historic dislike. Reinforced by the fact that I have to remove their expired products nine times out of ten while in the process of fixing the system.)
Anyway, if you know you need to get the AV sorted out, probably no problem. But (from an admittedly skewed sample of all the people who end up with problems) most people I have seen faced with an expiring anti-malware package just ignore it.
[1] OTOH, several have
not ignored the similar pleas from the "Windows Malware Remover", or whatever the FakeAVOfTheDay proclaims itself to be, once it has gotten onto the system. Sheesh.
[2] When I've been forensic about these things,
usually the obviously original infective file in the TIF directory is dated just after the AV's expiration.