LinuxQuestions.org - No GUI after update Fedora 20 and NVidia Card

I have tried to install NVidia Drivers and instead of going to Fedora Forums I looked on Google. Now I can only get a command window form a black screen by ctrl+alt+f2.

[root@localhost ~]# yum update kernel\* selinux-policy
Loaded plugins: fastestmirror, langpacks, refresh-packagekit
Loading mirror speeds from cached hostfile
* fedora: mirror.utexas.edu
* rpmfusion-free: mirror.web-ster.com
* rpmfusion-free-updates: mirror.nexcess.net
* rpmfusion-nonfree: mirror.nexcess.net
* rpmfusion-nonfree-updates: mirror.nexcess.net
* updates: www.gtlib.gatech.edu

(process:1790): GLib-WARNING **: GError set over the top of a previous GError or uninitialized memory.
This indicates a bug in someone's code. You must ensure an error is NULL before it's set.
The overwriting error message was: Parsing primary.xml error: Start tag expected, '<' not found

Traceback (most recent call last):
File "/bin/yum", line 29, in <module>
yummain.user_main(sys.argv[1:], exit_code=True)
File "/usr/share/yum-cli/yummain.py", line 355, in user_main
errcode = main(args)
File "/usr/share/yum-cli/yummain.py", line 174, in main
result, resultmsgs = base.doCommands()
File "/usr/share/yum-cli/cli.py", line 570, in doCommands
return self.yum_cli_commands[self.basecmd].doCommand(self, self.basecmd, self.extcmds)
File "/usr/share/yum-cli/yumcommands.py", line 489, in doCommand
ret = base.updatePkgs(extcmds, update_to=(basecmd == 'update-to'))
File "/usr/share/yum-cli/cli.py", line 1024, in updatePkgs
txmbrs = self.update(pattern=item, update_to=update_to)
File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 5094, in update
m = self.pkgSack.returnNewestByNameArch(patterns=pats)
File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 1071, in <lambda>
pkgSack = property(fget=lambda self: self._getSacks(),
File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 776, in _getSacks
self.repos.populateSack(which=repos)
File "/usr/lib/python2.7/site-packages/yum/repos.py", line 383, in populateSack
sack.populate(repo, mdtype, callback, cacheonly)
File "/usr/lib/python2.7/site-packages/yum/yumRepo.py", line 260, in populate
dobj = repo_cache_function(xml, csum)
File "/usr/lib64/python2.7/site-packages/sqlitecachec.py", line 46, in getPrimary
self.repoid))
TypeError: Parsing primary.xml error: Document is empty

[root@localhost ~]# rpm -qa *\nvidia\* *\kernel\*|sort;uname -r;lsmod |grep -e nvidia -e nouveau;cat /etc/X11/xorg.conf
abrt-addon-kerneloops-2.1.11-1.fc20.x86_64
abrt-addon-kerneloops-2.1.12-1.fc20.x86_64
kernel-3.11.10-301.fc20.x86_64
kernel-3.12.7-300.fc20.x86_64
kernel-3.12.8-300.fc20.x86_64
kernel-3.12.9-301.fc20.x86_64
kernel-3.13.7-200.fc20.x86_64
kernel-3.13.8-200.fc20.x86_64
kernel-headers-3.13.8-200.fc20.x86_64
kernel-modules-extra-3.12.7-300.fc20.x86_64
kernel-modules-extra-3.13.7-200.fc20.x86_64
kernel-modules-extra-3.13.8-200.fc20.x86_64
kmod-nvidia-3.13.7-200.fc20.x86_64-331.49-1.fc20.6.x86_64
libreport-plugin-kerneloops-2.1.12-1.fc20.x86_64
3.12.7-300.fc20.x86_64
nouveau 952612 3
video 19104 1 nouveau
mxm_wmi 12865 1 nouveau
wmi 18804 2 mxm_wmi,nouveau
i2c_algo_bit 13257 1 nouveau
drm_kms_helper 50287 1 nouveau
ttm 79787 1 nouveau
drm 283349 5 ttm,drm_kms_helper,nouveau
i2c_core 38476 5 drm,i2c_i801,drm_kms_helper,i2c_algo_bit,nouveau
cat: /etc/X11/xorg.conf: No such file or directory