Error when booting from live cd

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http://askubuntu.com – I am attempting to install Ubuntu 12.04 on what used to run Windows XP. The original OS is all but dead, so I am booting off of a CD created from the ISO download. Depending on the time, I either fail to reach the menu allowing to install Ubuntu, or I select the install Ubuntu option. Regardless of this, every time I reach the Ubuntu 12.04 screen with 4 dots. When I use the Shift+F6 shortcut, I receive the following error: stdin: I/O error stdin: I/O error unable to open '/dev/zram0' I have never worked with any sort of Linix before, so I'm quite clueless as to what this means, (HowTos)