Minecraft Launcher refuses to keep me logged in

I'm having a problem where every single time I close Minecraft Launcher and reopen it, I have to manually log in with my account. So far, I have tried reinstalling Minecraft Launcher, changing my password, reinstalling Minecraft, and skipping login and adding an account under settings > account. I'm at a loss... I don't run a VPN and I'm connecting straight to my ISP with no software/hardware that could possibly alter my IP (and reset my login). I'm not sure what to do. I'm running updated Windows 10 and am using a Microsoft SFB2.