If you see the message "Probing EDD (EDD=off to disable)" the following workaround should work:
If you are stuck on that screen with the above error, turn off your computer by holding down the power button for 5-10 seconds.
1. Normally start FixMeStick again.
2. After FixMeStick reboots your computer and begins the initial process, you will see the "FixMeStick - Virus Removal Device" screen with 3 options listed in the top left corner. Hit any key to access advanced boot options.
3. Press any key on your keyboard at that point.
4. Move down using the arrow keys on your keyboard and select "FixMeStick (Failsafe 1)" or "FixMeStick (Failsafe 2)"
5. Press Enter.
This will resolve the error and FixMeStick should now be working!