Have same Problem and no solution for this mistake.
Tried to upgrade severale times with different configurations. The result of every Trial was
0xC1900101 - 0x40017.
0xC1900101 - 0x40017.- Solved
Hey Guys!!,
I had the same issue in my laptop, I followed the all the step which me found on this forum.But nothing happened.
But now fortunately i got the solution of this issue . you just have to follow some step here.
- Go in the search option and write " refresh " so you will find a option like "Refresh your PC without effecting your files" just select this
- what will happen to do this . it will take some time to completed and it will remove all the window update and some third party software from your PC ( Including MS Office) and some drivers update .
but it will not effect your system file and all your important data surely even your PC setting also. after completed this activity , it will tell you about the removed program list as well. so you can reinstall all again.
- so now after complete this one. you need to update your window fully , no need to update any driver.
- then Open store and download the Window 8.1 and try to install it .
and Enjoy Window 8.1 !!!! with new start button
I am pretty sure that 100% this problem will be resolve .
Thanks
aniruddh