If those don't work, you're likely out of luck, and will need to format and clean install over it. I'm not sure if a repair will recover it now in the middle of a reinstall or not.

If you see Windows cannot install required files with error code 0x800701B1, there may be a software or hardware issue. Here are the fixes.

While performing the Clean Installation of Windows, you must select a hard drive partition on which you want to install Windows. The selected hard drive partition should be empty; otherwise ...