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I'm trying to upgrade to Windows 10 from Windows 7. However, it falls over at 71% stating c1900101-40017 with the following errors in the setuperr.log:

2015-10-09 10:27:05, Error [0x08085f] MIG MigHost:

CMigPluginSurrogate::LoadAndRegisterServerInThreadContext:

LoadLibraryExW(C:$WINDOWS.~BTSourcesReplacementManifestsMicrosoft-Windows-RasServer-MigPluginRasMigPlugin.dll,

LOAD_WITH_ALTERED_SEARCH_PATH) failed gle=0x7f.[gle=0x0000007f]

2015-10-09 10:27:05, Error [0x080863] MIG MigHost:

CMigPluginSurrogate::COMGenericThreadingHostThreadProc:

LoadAndRegisterServerInThreadContext() failed

hr=0x8007007f.[gle=0x0000007f] 2015-10-09 20:35:49, Error [0x08085f]

MIG MigHost:

CMigPluginSurrogate::LoadAndRegisterServerInThreadContext:

LoadLibraryExW(C:$WINDOWS.~BTSourcesReplacementManifestsMicrosoft-Windows-RasServer-MigPluginRasMigPlugin.dll,

LOAD_WITH_ALTERED_SEARCH_PATH) failed gle=0x7f.[gle=0x0000007f]

2015-10-09 20:35:49, Error [0x080863] MIG MigHost:

CMigPluginSurrogate::COMGenericThreadingHostThreadProc:

LoadAndRegisterServerInThreadContext() failed

hr=0x8007007f.[gle=0x0000007f]

How can I fix this?

Windows 10 Upgrade Error c1900101 40017

The cause for error 0xC1900101 – 0x40017 is known to be faulty drivers.

There have been reports of a USB driver causing this error. Until a specific USB driver can be determined as a root cause, if you receive this error, we recommend you unplug all USB devices (other than your mouse and keyboard) as a troubleshooting step and try the upgrade again. If the upgrade is then successful, you can plug the devices back in and they should function normally.

We have identified a few drivers associated with the following hardware or software that could be causing this problem:

• NVIDIA Video card. Check to make sure you’ve upgraded to the latest video drivers




• Disable (preferably 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

How to download official Windows 10 ISO files

If you are installing Windows 10 using Windows Update, try the following:

1. Press Windows Key + X on the keyboard and then select “Command Prompt (Admin)” from the menu.



2. 
   

   Stop the BITS, Cryptographic, MSI Installer and the Windows Update Services. To do this, type the following commands at a command prompt.
   Press the “ENTER” key after you type each command.

   
   
   

   net stop wuauserv
   
   net stop cryptSvc
   
   net stop bits
   
   net stop msiserver
   
   

   
   


3. 
   

   Now rename the SoftwareDistribution and Catroot2 folder. You can do this by typing the following commands in the Command Prompt. Press the
   “ENTER” key after you type each command.

   
   
   

   ren C:WindowsSoftwareDistribution SoftwareDistribution.old
   
   ren C:WindowsSystem32catroot2 Catroot2.old
   
   

   
   


4. 
   

   Now, let’s restart the BITS, Cryptographic, MSI Installer and the Windows Update Services. Typethe following commands in the Command
   Prompt for this. Press the ENTER key after you type each command.

   
   
   

   net start wuauserv
   
   net start cryptSvc
   
   net start bits
   
   net start msiserver
   
   

   
   



5. Type Exit in the Command Prompt to close it and then restart the computer.

Source How to: Troubleshoot common Setup and Stop Errors during Windows 10 Installation