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Windows 10 Insider Preview 17666.1000 - failed install attempt - 0xc1900101
LS, it seems that the latest preview build does not get installed. What's even more mysterious, is that the previous, successful installation, was a newer release than the one not installing curr...
I am having the same issues. Are you on build 1803.
I was able to get mine to update by leaving it over the weekend.
PS: the install from stable to this insider preview took 2 hours, I was not expecting it to take that long.