"Couldn't update to Windows 8.1 - 0xC1900101 - 0x40017"

In order for me to remove the wireless "card" I would have to remove the motherboard from the case since it is secured by a screw on the bottom of the motherboard.  (Asus P9X79_DELUXE).

You probably don't need to remove it to disable it.  E.g. on my TouchSmart there was a physical slider switch would could do it.  Then just hook up an Ethernet cable to your modem and be wired instead of wireless.  Probably would be a good idea to get the router out of the picture too anyway.

Otherwise here's another thread where you could get some more ideas

http://answers.microsoft.com/en-us/windows/forum/windows8_1-windows_install/error-0xc1900101-0x40017-when-installing-windows/8c893ae6-0e9b-4b7d-a647-b9065099efd6

Is it true that you have to have 8.1 in order to upgrade to 10?

Supposedly you could start from W7sp1.   <eg>

HTH

Robert Aldwinckle

You must have Windows 8.1 in order to upgrade (in-place; i.e. without clean install) to Windows 10.

I had this issue when Windows 8.1 was released.  I used the "WhoCrashed" tool to analyze the crash dump from the BSOD that led to this error.  It pointed me squarely at the NVIDIA driver and from there I was able to solve the problem.

Trying again and again won't do you any good.  Find a way to figure out which driver or other piece of system software is causing the issue ("WhoCrashed" is a good first step for this), remove it from your environment, and upgrade.

I too have tried everything I can (without having to take my system apart) and have the same issue.

One last thing someone mentioned is the wireless "card" causing this which now also includes the IRQ Less than or Equal error... or something similar.

In order for me to remove the wireless "card" I would have to remove the motherboard from the case since it is secured by a screw on the bottom of the motherboard.  (Asus P9X79_DELUXE).

Is it true that you have to have 8.1 in order to upgrade to 10?

Please MS,  fix this.

tried again, failed at second boot with 0x40017, after a year still coulnd't get 8.1, what if same error code comes up again when upgrade to Windows 10? this is the worst experience using a software ever, and with such a popular error, Microsoft couldn't come up with some solution to at least tell the costumer where went wrong.

please, I;ve tried many times contacting MS support centre to no avail, and as a professional freelancer the last thing I want to do is a fresh install, I could have to spend weeks to re-setup everything.

thanks. This has worked for me.