Boot from a partition (Windows 8)

Boot from a partition (Windows 8)

I'm currently running Windows 8 on an HP Pavilion g7 laptop and I tried
installing Ubuntu 13.04 from my flash drive just recently.
Installation went as normal and I created a 50 GB partition for it. At the
end it said I needed to reboot so I pressed OK. A few seconds later an
error message popped up and said there was an error and I needed to reboot
(or I could stay at the desktop and debug or something). I clicked stay at
desktop but it kicked me out into a command line and I really couldn't do
anything there so I just held the power button and shut it off. Now I have
the partition made (it shows up in Windows as the G: drive), I just have
no way to access it without booting from live disk/usb.
Is there some way I can pick which partition to boot from when I power my
laptop on?
Edit: Don't know if it helps much but I remember my caps lock key flashing
when I was stuck at the command line thing. (Maybe someone will know what
I was at from this?)