RE# : Source files could not be found.

Use the Tech Bench link to download your version of Windows 10 ISO file.
http://www.microsoft.com/en-us/software-download/techbench
Make sure you pick the...

2 suggestions :

1.Run a system file check to look for corrupt files. It will try to repair if any found.
Right click at Start button > click Command Prompt (Admin) > at the flashing prompt,...