Build 18950 fails with 0xc1900101 RRS feed

  • Question

  • Since build 18932, builds 36, 41, 45 and now 18950 have failed to install with error 0xc1900101 I know this error was supposedly "fixed" in build 45 according to the logs, but I and others in the net world have also experienced this. Any fixes or should we just sit tight? As of now have I have the updates "paused"  till the next build, otherwise even on the 7th try, it still fails with 0xc1900101
    Friday, August 2, 2019 5:03 PM

All replies

  • You could try the following method.

    Stop the Windows Update service.

    Then delete files and folders in the next location.


    Then try to install a build again.
    Friday, August 2, 2019 5:17 PM
  • Thanks for your input T. Kujala. Tried your suggestion. No good. Still same error

    Windows 10 Insider Preview 18950.1000 (rs_prerelease)

    Failed to install on ‎8/‎5/‎2019 - 0xc1900101

    Monday, August 5, 2019 3:15 PM
  • Now build 18956 ending with error 

    Windows 10 Insider Preview 18956.1000 (rs_prerelease)

    Failed to install on ‎8/‎9/‎2019 - 0xc1900101

    Please advise...

    Friday, August 9, 2019 5:05 PM
  • Is there any Microsoft employees monitoring this technet forum?

    Windows 10 Insider Preview 18956.1000 (rs_prerelease) (2)

    Last failed install attempt on ‎8/‎10/‎2019 - 0xc1900101

    Saturday, August 10, 2019 5:26 PM
  • Still getting same error.

    Build 18963 ends with error 

    Windows 10 Insider Preview 18963.1000 (rs_prerelease)

    Failed to install on ‎8/‎17/‎2019 - 0xc1900101

    Saturday, August 17, 2019 4:01 PM
  • Oxc1900101 solved for this user! It was the lack of disk space. It seems 20 gigs free is not enough and will produce this ill defined error. Using partition software I added another 20 gigs space the the C: drive and what do you know? I'm now finally at 18963. 

    So, if you know anyone getting 0xc1900101 ask first if they have at least 50 gigs free on the C: drive!

    Sunday, August 18, 2019 3:11 PM
  • Issue Solved. For this user, 0xc1900101 is a cryptic way of saying, "You don't have enough disk space on C: drive to complete the update"

    Seems simple, do a pre-scan of free space on the drive Before an update is attempted. I used some re-partition software and increased C: free space. Make sure you have at least 50 gigs free for an update!

    Tuesday, August 20, 2019 3:38 PM
  • Guess I was wrong. 

    Windows 10 Insider Preview 10.0.18970.1005 (rs_prerelease)

    Failed to install on ‎8/‎30/‎2019 - 0xc1900101

    Friday, August 30, 2019 5:52 PM