If you decide to make a major update of your system, do make sure to install some core packages first, otherwise just simple “sudo yum update” might lead to a corrupt installation. This is all because, for instance, that when a new kernel is ready and available, kmod-nvidia drivers in the Livna repo might be missing for this very kernel version for a couple of hours or even days.
sudo yum update kernel kernel-devel kernel-headers kmod-nvidia ntfs-3g *virt*
Just watch the output to make sure everything runs smoothly.
After that you might want to issue
sudo yum update
Of course, another option is to use the yum‘s –exclude=blah directive.