I tried upgrading to Windows 10, and I was reverted back to Windows 7 and got this:
0xC1900101 - 0x20017
The installation failed in the SAFE_OS phase with an error during BOOT operation
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I had the same error when I tried to upgrade from 8.1 to 10.
In my case it was caused by an onboard Marvell 88SE61xx controller which probably the Windows 10 install image doesn't include drivers for.
After disabling that controller in BIOS, Windows 10 could boot and finish the installation.
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