I dowloaded by bittorrent the image and used the Etcher portable app (in Windows 7 and my Dell Optiplex 7019) to burn to a 16gb flash drive. It booted up fine and I used the Tor Browser for several hours with no problem. But, after closing Tails and trying to reboot the computer again into Tails, the computer booted instead into Windows. When I tried again, using the F12 key to pull up the boot menu, the menu showed no bootable USB drive. When I looked at the drive in another computer running Puppy Linux, the disk manager program (I forget the name of it) showed the partition seemingly intact with the "boot" option still checked.
I then did the whole process again with exactly the same results: first time fine, but not able to boot up on subsequent tries.
Hope this helps!
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