I recently tried to update to 8.1 after waiting 6+ months when I first received the 0xc1900101 - 0x20017 error. I have since received this error every single time and each time I try some new suggestion. Tier 1 support could not assist in a remote session. I will see what tier 2 says. I am also trying some further suggestions today after work.
My laptop is an HP ~1 year old and was pre-installed with windows 8. I will eventually post every detail of what I am running. From everything i've read, NVIDIA chipset seems to be the culprit for most. Any word?