Integrity Error 0x8000001

1144878800  When you repaired your system's files, did you:

• Open the Command Prompt in administrator mode
  
  
• Type, "DISM /Online /Cleanup-image /Restorehealth" (without the quotes), and wait for it to finish.
  Note: DISM stands for "Deployment Image Servicing and Management tool". It often repairs Microsoft related files, such as issues with Window apps. Some problems with the next file checker can only be fixed after running this one first.
  
  
• Now type, "sfc /scannow" (without the quotes), and wait for it to finish.
  Note: sfc stands for "System File Checker". This one will repair system files, (such as important Windows drivers).
  
  
• Lastly, restart your PC.
  
  

If you had ran those two commands, (or those two commands didn't work), you may have to reinstall Windows.

Note: I wouldn't use the "reset my PC" in the settings, as if the PC's system files are corrupted, (and can't be repaired using the above repair commands), chances are it won't be able to reinstall Windows properly using its own files.