Game crashing whenever I try to play in borderless window mode or press alt + tab

[Whoger]

That's weird, specially considering I configured FFXIV on my nvidia control panel to use the Nvidia GPU.
So I tried discovering how to disable optimus on my pc and it turns out I can't. But the weird thing is: earlier this year I was able to play FFXIV without any problems! And I didn't change anything on my pc (save updating the drivers)
I then decided to try using the nvidia gpu as my global configuration, but when doing that the FFXIV Launcher won't load correctly, not allowing me to do my login, staying always in the screen with the game logo.

[Whoger]

Hi!! Posting here just to inform that I solved the problem!!

Turns out my intel driver was outdated, despite telling me it was up to date when I tried to update it using the device manager.

So I had to download the new one from the intel website, uninstall the old one, delete it from my pc,turn off the internet, restart the pc and install the new driver. Doing that made the game stop crashing and now I can play without any troubles!!

Thank you everyone who helped me in this thread!