I have windows vista, and I downloaded Ubuntu 12.04 and burned it onto a blank cd disk. I then went through the installation process by clicking install Ubuntu on the menu that popped up after booting from my disk. I then selected the option that said install alongside windows vista.
This is where it gets weird. It gave me the partition creator/slider option to decide how much data I needed for windows and Ubuntu. It displayed only like a total of 10 gigabytes, giving windows vista around 6 gigs, and Ubuntu 12.04 around 4 gigs. My computer has a 500 gigabyte hard drive so I have no idea why it gave me such small numbers.
After clicking next I decided that I should restart with the "create your own partitions" option so I restarted the computer and booted straight back into the disk I had Ubuntu on. I made a 500mb Linux swap partition, and a 25GB primary ex4/journaling partition mounted at /. I selected that partition, and the installation process began.
It was installing okay until towards the end, when it froze. The mouse pointer was no longer moving and the loading animation was not spinning anymore. I waited around ten minutes and nothing happened so I force shut down the computer.
I repeated the whole installation process remaking the partitions, and Ubuntu finally installed. The installer told me to restart the computer so I did. When it booted up it gave me a screen that said "frequency out of range" I couldn't do anything with my computer.
After that I restarted my computer again and after going to the frequency out of range screen, it actually booted Ubuntu.
Overall, I now have a computer that SOMETIMES boots to Ubuntu, and I can't boot into windows at all. This is a serious problem because all of my parents stuff and my stuff is on windows. Please help.