After numerous failed upgrades due to 0xC1900101, just wanted to report that if you're still on 17004 or earlier, you can also create an ISO of 17017, extract the contents to your harddrive and then...

I know this is an old thread but I had the exact same issue and was able to fix it - it was caused by Icaros Thumbnail provider. After uninstalling Icaros and clearing the thumbnail and icon caches,...