Constant FPS Drops

I usually play at max settings and get around 120 FPS, but for about 4 days or so, maybe more, I get sudden and sporadic FPS drops where my framerate drops to about 44 for a moment, sometimes prolonged, and then returns to normal.

However, this is the annoying part;
I've cleaned all viruses from my PC, made sure my drivers are up-to-date, cleaned out/fixed my registries, and even reinstalled the game and this problem is still persisting.

My GPU is at 41c, my CPU is at 40c, (or less,) so it isn't a heat problem, either.
My task manager also says there's no other high-draining processes, there's nothing within 800,000K usage of FFXIV (which is at roughly 990,000K usage.)

Reducing my settings down to Standard (Laptop) doesn't alleviate the problem, either, but the FPS drops to 88 instead of 44 so it at least doesn't feel so bad, though the game feels like it might be dropping further below that without showing it? It still feels like lag even though it's above 60 FPS, so I'm assuming that the FPS isn't quite being read right.

Any help on this would be massively appreciated.

-=-=-=-=-=-=- FFXIV Information -=-=-=-=-=-=-

MyDocument C:\Users\Ryan\Documents
FINAL FANTASY XIV - A Realm Reborn C:\Program Files (x86)\SquareEnix
FINAL FANTASY XIV - A Realm Reborn Language 1 Region 3
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SYSTEM_DIRECTX_VERSION DirectX 11
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SYSTEM_GRAPHICS_DRIVER_DATE 16/09/2017 20:23:33
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-=-=-=-=-=-=- Application Information -=-=-=-=-=-=-

FFXIVLauncher
FINAL FANTASY XIV: Mog Station - Google Chrome
FFXIV_CHR004000174A8F9694
Sticky Notes
My Games
Edonice - Chat
Programs and Features
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NVIDIA Display Container LS
NVIDIA Display Watchdog Plugin
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-=-=-=-=-=-=- Proccess Information -=-=-=-=-=-=-

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