Re: impossible to install 8762 driver
sh NVIDIA-Linux-x86-1.0-8672-pgk1.run --uninstall
uninstalls the driver.
This doesn't look like an issue that requires the --x-module-path, however you could certainly try using it if you'd like.
At this point, I'd wonder if the driver package that you've downloaded is corrupt. It should have an md5sum of 86bcf4a3a9d441dff9e25b82ec8a6060.