I tried installing Ubuntu 12.10 over my Windows 7 OS and a couple of errors appeared, I cannot remember what they said but, I tried rebooting and now when my computer starts it first shows the first image when you first boot it but then all that appears is a blinking dash in the upper left hand corner of the screen and I have tried pressing every button and nothing happens. The only thing I can do is Con+alt+delete and have the system restart only to have the same thing happen. I was trying to install from USB. Should I try burning the OS to a disk or what can I do to fix this??
You might want to consider trying a CD/DVD instead. I have had some problems in the past with using a flash drive over a disc.
Take a look at the following posts: http://forums.linuxmint.com/viewtopic.php?f=46&t=68510
I would try the recommendations there and see if that changes anything.