I have a Samsung ATIV XE500T tablet with At&t built-in. I was able to upgrade to Windows 8.1 without a problem, and I upgraded to Windows 10 TP just fine, but now I can't get to build 9860. The upgrade will start, finish the install part from within Windows, then when it reboots, I'll get the Samsung screen and it'll go through the Setting Up System, then reboot and finish the Devices Setup and reboot again, then it'll go through Applying PC Settings, but then it'll reboot and I'll get the Samsung screen with the spinning orb like its setting something else up but there's no text underneath it like the previous steps. The blue webcam light will be blinking. I'll leave it for 2+ hours, then eventually it'll get to my login screen and tell me that it couldn't update to the TP build with error code 0xC1900101-0x40017. I uninstalled drivers for my Wedge Keyboard & Mouse and I uninstalled the graphics driver (I read where that has caused issues for other computers). I took out my microSD card. Same problem. I cleaned out all temp files and redownloaded the update a couple times. I've only tried updating through Windows Update in PC Settings. I have about 25GB free on my hard drive. Any other suggestions? Thanks.