be more specific? help
go to the folder you have installed the game, type powershell in the search bar (i dont know the name but the one that shows the location of the folder). after that it should appear a window called "window powershell" in that windod it should appear the location of the folder of the game, an example would be something like "c:/user/user/desktop/fnf" (yours can be different). then run the comand "tee log.txt | ./Funkin.exe" in windows powershell.
it should run the game, dont close the windows powershell while you game