The Specify Windows installation file location machine setting should be configured correctly. Specifies an alternate location for Windows installation files. To enable this setting, and enter the fully qualified path to the new location in the "Windows Setup file path" box. If you disable this setting or do not configure it, the Windows Setup source path will be the location used during the last time Windows Setup was run on the system. Fix: (1) GPO: Computer Configuration\Administrative Templates\System\Specify Windows installation file location (2) KEY: HKLM\Software\Policies\Microsoft\Windows NT\Setup\SourcePath