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Boots fine into windows without driver installed (listed in device manager as detected but not installed). I tried reinstalling bootcamp again with windows 10 and the bootcamp 4 drivers instead of bootcamp 6 I tried reinstalling bootcamp with Windows 8.1 I've not re-installed the EFI mod as several users say it will only cause further problems with 2015 Macbooks (and it didn't help before). I got a message which says : /Library/LaunchDaemons/ist: Operation already in progress, automate-eGPU-daemon launched. Background services enabled. (So I suppose that was successful) That affects the initialization of the eGPU and may aid your Windows hang on boot. Difference there it installs in MBR/BIOS rather than UEFI mode. Did you re-do the steps I posted previously? If done and problem persists then consider doing a Bootcamp 4.0 installation of Windows.
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