I deleted all the drivers hvciscan identified (mostly for a Logitech webcam I use, but also one which is used to download videos (jaksta)
After all this, hvciscan said no drivers were found as non compliant.
The update still fails with the same code as before
0xc1900101 - 0x20017 failed in safe_os during boot
The error code and the extended error code you mentioned can usually be fixed by updating the BIOS and the chipset drivers for your motherboard.