I donwloaded linuxmint-17.2-cinnamon-64bit.iso to a USB drive.
What you need to do is Burn the ISO to USB so it becomes bootable. ( Do not worry it wont hurt your USB ), You can also burn the ISO to DVD.
Do you have access to a Windows 7 or greater machine?
How to burn ISO image to CD or DVD using Windows Burn Disk Image.
Notice: This applies only to Windows 7 and Windows 8, earlier versions do not have this.
1. Place a blank CD or DVD in the tray of your optical drive and close the tray.
2. After you have downloaded the ISO image you want to burn right click on the Start orb, then choose Windows Explorer.
3. When Explorer opens click on Downloads in the left pane. Scroll down till you find the ISO file you want and double click on it. Click on Burn Disk Image.
4. In the image below you will see Disk burner:, this should be set to the optical drive you want to use. Click on Verify disc after burning if you want to Windows to verity the disc image after burn. Click on burn.
5. In the image below you can see that the green progress bar, when the image is finished burning the bar will be filled.
6. After the image has completed being burned click on Close.
If you dont have access to a Win 7 machine or if your PC has not got a optical drive you will need to use a tool similar to Unetbootin.
It sounds like you simply copied the iso file to the USB key that had HitmanPro Kickstart already installed on it. You need to use a program like Rufus or Unetbootin to create a bootable USB flash drive. If you only want to test Mint and also be able to save your settings and programs then I would use LinuxLive USB creator that will let you add persistence. I would wait for an answer from one of the linux guru's though.
Follow these instructions provided by JohnC.
I was in the middle of replying when John replied.
Edited by NickAu, 20 August 2015 - 05:45 PM.