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I am having trouble installing either Ubuntu or Xubuntu 14.04 or even upgrading to Ubuntu 14.04. I get a consistent result which is that once the system gets to the login screen or, if I'm booting from a live CD, when I get to the desktop, my system will reboot automatically.

I was able to install Ubuntu 13.10 with no problems. I tried upgrading via the Software Updater, when the process finished it presented a warning about the process halted because too many errors occurred. It looked like it had something to do with dpkg processing errors, but I'm not sure since I'm still new to Linux in general.

I used to run Ubuntu 14.04 on this same system and removed it to try Fedora 20, but now it won't work when I try to re-install. My CPU is AMD A10-6800K APU with Radeon(tm) HD Graphics on a MSI FM2-A85XA-G43 motherboard. I do not have a screenshot of the error, but I wonder if anyone has seen this type of problem before. I will add a screenshot when I have time to try again.

UPDATE I just ran the install disc on my older HP Pavilion P7-1010-PC and the installation is going through just fine.

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It looks like something went wrong during installation process. Can you try sudo apt-get clean from terminal and then try installing it. Other thing to watch out is media and memory errors. I had mysterious reboots and many problems with my ubuntu 14.04 and it turned out to be bad memory –  user871199 Jul 13 '14 at 1:26
@user871199 When you say bad memory, are you talking about bad memory on the disc/USB or as in RAM? Also at what point would I run sudo apt-get clean? My process so far has been to install Ubuntu 13.10, and then once installation and reboot is complete, to run sudo do-release-upgrade. I'm just wondering to make sure we are on the same page. –  Monkey_Likey Jul 13 '14 at 22:28
It was RAM, but one of the symptom was not able to read properly from usb and disk. In my case installation will proceed until some point it complained not able to read the file. After installation was finished, machine will not work as expected. If you have clean machine after installing 13.10, then apt-get clean may not be needed. –  user871199 Jul 14 '14 at 17:28

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