@echo off

setlocal enabledelayedexpansion

for /R %%i in (*.exe) do (
    SET name=%%i
    certutil -hashfile %%i MD5 | find /i /v "md5" | find /i /v "certutil" >> tmp.txt
    SET /p hash=<tmp.txt
    echo !name! : !REG3XP0!>!hash!
    if not exist md5sums.txt (
        echo !name! : !REG3XP0!>!hash! >> md5sums.txt
    )
    del tmp.txt
)