Win7 to Win10 1809 upgrade fail unknown error -1047526944

Hi I'm trying to perform an upgrade of Windows 7 to Win10 1809 but I'm getting the following, any ideas? I've removed AV from the PC as I thought aht might be causing the issue.

[ 2019-08-27 10:26:48:827 ] [ 4936 ] [INFO] ########################################## INSTALLATION ###################################################

[ 2019-08-27 10:26:48:827 ] [ 4936 ] [INFO] InstallGivenPackage : Going to perform the Installation action for the given Package.

[ 2019-08-27 10:26:48:827 ] [ 4936 ] [INFO] InstallEXEFile : Working Directory path -> \\Server\DCSWRepository\Windows10\1809.

[ 2019-08-27 10:26:48:827 ] [ 4936 ] [INFO] InstallEXEFile : Root path -> (null).

[ 2019-08-27 10:26:48:827 ] [ 4936 ] [INFO] InstallEXEFile : TimeOut Value -> 14400 seconds

[ 2019-08-27 10:26:48:827 ] [ 4936 ] [INFO] InstallEXEFile : Set the Current Directory called with -> \\Server\DCSWRepository\Windows10\1809.

[ 2019-08-27 10:26:48:881 ] [ 4936 ] [INFO] Message : The operation completed successfully.

[ 2019-08-27 10:27:19:257 ] [ 4936 ] [INFO] InstallEXEFile : Exit code of the process : -1047526944

[ 2019-08-27 10:27:19:257 ] [ 4936 ] [INFO] deleteValue: Key found ...!: 0

[ 2019-08-27 10:27:19:257 ] [ 4936 ] [INFO] deleteValue: Delete value DCCreateProcessStatus success!

[ 2019-08-27 10:27:19:257 ] [ 4936 ] [ERROR] Error Code : -1047526944 , Error Message : Unknown Error. Code : -1047526944

[ 2019-08-27 10:27:19:258 ] [ 4936 ] [INFO] InstallGivenPackage : Configured ExitCode and return code from process are : 0 and -1047526944

[ 2019-08-27 10:27:19:258 ] [ 4936 ] [ERROR] InstallGivenPackage : Error while performing Installation function.

[ 2019-08-27 10:27:19:258 ] [ 4936 ] [INFO] *************************************************************************************************************

[ 2019-08-27 10:27:19:258 ] [ 4936 ] [ERROR] Error Code : -1047526944 , Error Message : Unknown Error. Code : -1047526944

[ 2019-08-27 10:27:19:258 ] [ 4936 ] [ERROR] InstallUninstallPackage : Failed to install the package Win10_1809

[ 2019-08-27 10:27:19:258 ] [ 4936 ] [INFO] @@@@@@@@@@@ End of InstallUninstallPackage Method @@@@@@@@@@@