Unable to load the kernel module "nvidia.ko". This happens most frequently when this kernel module was built against the wrong or improperly configured kernel sources, with a version of gcc that differs from the one used to build the target kernel, or if a driver such as rivafb/nvidiafb is present and prevents the NVIDIA kenel module from obtaining ownership of the NVIDIA graphics device(s).

Please see he log entries "Kernel module load errors" and "Kernel messages" at the end of the file "/var/log/nvidia-installer.log" for more information.