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#36300
Swap USB ports for a few seconds, if it doesn't restart keep swapping till it does.
#36560
I got past this by having two USB Flash Drives loaded with the installer. I had one in a USB2 port that started the installer. Once it gets to the stop sign, the USB drive in the USB3 port kicked in and finished the boot process. I removed the one in the USB port after it booted into the installer.
Post Merged
EDIT: I removed the one in the USB2 port after it booted into the installer.

If you dont have to USB drive do as Norton287 suggested and swap/move your USB installer to different USB ports on your machine as soon as the stop sign appears.

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