installed livecd to boot sector?

[Michael]

I have no idea what I  did wrong......
first..... darktable was messing up so I decided to upgrade Mint to the
newest version to see if that would fix it.
I put the disk in and installed it but upon restarting the live disk loaded
again. Then I tried installing it again but it would load the OS from the
live disk (I guess) but then when the gui started it would access the hard
disk drive. I then tried putting a previous version on and this time it
installed (instead of failing) but when I restart the computer it loaded
the live disk (which was not in the computer at the time. What in the world
did I do?
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