[ubuntu] Installing from CD

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http://ubuntuforums.org – Hi. So I am not a first-time Linux user and I have dual-booted in the past. But today I wanted to install Ubuntu 12.04 alongside Windows 7, but when I restarted my computer with the Ubuntu live disc, it just went straight to Windows. I set the CD Drive to be the first to load on my BIOS already. Also, when I push f12 to check the boot options, it says something about boot mgr damaged (I can get exact error message if needed). I have used this same disc to install Ubuntu before, so I know the disc is fine. I also tried installing Linux Mint (13 and 14) the same way, but when restarting my comp (Hardware)