Liveone74 How are you doing for broken system?
If you just inject USB KEY to tryout and can't boot system when remove USB KEY:
just check your first boot are your harddrive on Mainboard BIOS Config.
If your are use 'INSTALL BATOCERA' on Batocera's main menu:
All filesystem seens crashed,you can try to use some Linux's Live CD(like Manjaro) for USB KEY to seen have anything can copy out?I think maybe all partition is crashed.If nothing to copy out,take a USB KEY and another Windows computer,go Microsoft HP to download MediaCreationTool,make a installer and use it to boot your system.When your system boot on Windows Installer,refdisk your disk partition and click "I don't have CD-KEY" to continue install Windows.If you not sure how to do for install Windows,use your Mobile Phone and search on Google(or Bing,whatever).
You are take a useful lesson,bro.Do not try to install any system on your main disk,and try to distinguish someone are Program or System.