You need to make the scratch directory before you run the dism command. If the drive you want to use for the scratch folder is E: then from a command prompt type:
MD E:\SCRATCH
Before you go through trying to install Windows 10 again. Run Crystaldisk. I've used itin my computer repair business for years and it has caught a few HDD's that are dying. Just for simplicity pay attention to the color it comes up with at the top. If green oh Yellow caution, Red is a bad drive and you will need to replace it before installing Windows.
You can reduce WINSXS folder size by executing following Dism command.
After executing this command you cannot uninstall currently installed Windows updates.Code:Dism /Online /Cleanup-Image /StartComponentCleanup /ResetBase
Reduce the Size of the Component Store (WinSxS folder)
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