Something didn't work out with the upload.
Allow the computer to complete the first restart, then browse to C:\Windows\Logs\CBS
Copy the CBS.log file to your Desktop, then right click on it and choose Send to... -> Compressed (zipped) Folder
Attach the CBS.zip file with your reply.
If the zip is larger than 8MB, please use a file sharing service such as OneDrive, DropBox, SendSpace, etc. and include the link with your reply.