rem *获取GUID
bcdedit /store bcd /enum all >a.txt
@echo off&setlocal enabledelayedexpansion
for /f "tokens=2" %%a in (a.txt) do set /a n+=1&set "_!n!=%%a"&set ".%%a=!n!"
set /a .boot-=5
bcdedit /store bcd /default !_%.boot%!
del /q a.txt
bcdedit /store bcd /displayorder {default}