I would (if updating mirrors does not work):
yay nvidia | grep installed
To see what is installed, then
sudo pacman -Rdd <dodgy-package>
sudo pacman -S <replacement-for-dodgy-package>
Obviously not rebooting until finished. These are the 535 series I have:
28 multilib/lib32-nvidia-utils 535.86.05-1 (46.1 MiB 206.7 MiB) (Installed)
15 extra/libxnvctrl 535.86.05-1 (76.4 KiB 456.9 KiB) (Installed)
9 extra/nvidia-settings 535.86.05-1 (767.0 KiB 1.6 MiB) (Installed)
5 extra/nvidia-utils 535.86.05-2 (260.8 MiB 670.8 MiB) (Installed)
2 extra/nvidia-dkms 535.86.05-2 (42.9 MiB 69.9 MiB) (Installed)
As a guide.