PC:
OS Version 10.0.17763.437 (Win10 RS5 [1809] October 2018 Update)
CPU Type HexaCore Intel Core i7-8700, 4300 MHz (43 x 100)
Motherboard Name Gigabyte H370 HD3 (1 PCI, 4 PCI-E x1, 2 PCI-E x16, 3 M.2, 4 DDR4 DIMM, Audio, Video, Gigabit LAN)
Motherboard Chipset Intel Cannon Point H370, Intel Coffee Lake-S
System Memory 65395 MB (DDR4 SDRAM)
Audio Adapter Intel Kaby Lake HDMI @ Intel Cannon Point PCH - cAVS (Audio, Voice, Speech) [B0]
Audio Adapter Realtek ALC887 @ Intel Cannon Point PCH - cAVS (Audio, Voice, Speech) [B0]
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This just started happening about 3 or 4 months ago. When I play any video locally, the sound starts off synced with the video but after a few minutes it is out of sync. Noticable because I use subtitles when ever possible. If I pause then restart the video, it resyncs but goes out of sync in a few minutes. I have to rdp to another machine and play the same video remotely. So is not the file in any way. I already tried reloading the drivers from H370 HD3 (Rev. 1.0) - Support | Motherboard GIGABYTE. Was not caused by an update since I have those turned off. BTW, it happens with whatever I use as a player, all programs (vlc, wmp) and all browsers.

I think it happened when I upgraded the boot drive NVME from 512gb gen 3 to 2TB gen 3x4 but I don't know why that would affect only the audio or video

Any one know some way of changing this?