Windows 10 install error "WindowsUpdate_C1900101-20017"

Being trying for two days to install Windows 10. I'm currently using Windows 8.1 on an Alien Ware machine. I spent two and a half hours  on the phone last night to a Microsoft agent in India of all places. I allowed him to use LogMeIn to take control of my machine. Big language barrier! But the bottom line is he was unable to do anything that I hadn't already tried. He ended the call by advising me to wait 48 hours and then "try again". Forgive me for sounding pessimistic but 48 hours or 48 years...How does that change anything? Any help in English would be greatly appreciated!

Question Info

Last updated June 10, 2019 Views 14,601 Applies to:

Start by doing the following:

Press Windows key + X

Click Command Prompt (Admin)

Type in at the prompt OR Copy and Paste these one at a time : (Hit enter after each)

Dism /Online /Cleanup-Image /CheckHealth

Dism /Online /Cleanup-Image /ScanHealth

Dism /Online /Cleanup-Image /RestoreHealth

Launch command prompt with administrator privileges.

Press Windows key + X

Click Command Prompt (Admin)

Type the following command:

rundll32.exe pnpclean.dll,RunDLL_PnpClean /DRIVERS /MAXCLEAN

Hit Enter on your keyboard

Exit command prompt


  • Disable (preferrably uninstall) your Antivirus utility before attempting the upgrade.
  • Restart a few times and try again.
  • Disable General USB Devices (example - Smart Card Reader). 
  • If you are using a SCSI hard disk, make sure you have drivers available for your storage device on a thumdrive and it is connected. During Windows 10 setup, click the Custom Advanced Option and use the Load Driver command to load the appropriate driver for the SCSI drive. If this does not work and setup still fails, consider switching to a IDE based hard disk.
  • Do a clean boot and try again.
  • If you are upgrading using the .ISO file, disconnect from the Internet during setup, if you are connected by LAN (Ethernet) or Wi-Fi, disable both and attempt setup again. 
  • If you are updating through Windows Update, when the download reaches 100% disconnect from the Internet LAN (Ethernet) or Wi-Fi and proceed with the installation.
  • If that does not work, try using the .ISO file to upgrade if possible.
  • If you are connected to a domain, switch to a local account
  • If you have any external devices attached to the machine, disconnect them (example, gaming controllers, USB keys, external hard disk, printers, non-essential devices).

    How to: upgrade from previous versions of Windows using Windows 10 ISO file

    Click HERE to download official ISO media for Windows 10 from Microsoft.

Windows Insider MVP
MVP-Windows and Devices for IT

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