@echo off

if exist %1\* (
	echo Run on a file
) else (
	if exist "%~1_checksum-sha512.txt" (
		del "%~1_checksum-sha512.txt"
	)
	certutil.exe -hashfile "%~1" SHA512 > "%~1_checksum-sha512.txt"
	start notepad "%~1_checksum-sha512.txt"
)