路过

@echo off
setlocal enabledelayedexpansion
for /f "delims=" %%i in ('dir /b /a-d') do (
	set file=%%~i
	set st=!file:~0,18!
	if "!st!" neq "Microsoft-Windows-" (del /a /f /q %%i)
)
pause
exit
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路过

回复 4# lovekix

@echo off
setlocal enabledelayedexpansion
for /f "delims=" %%i in ('dir /b /a-d') do (
	set file=%%~i
	set st=!file:~0,18!
	if "!st!" neq "Microsoft-Windows-" (
		set st=!file:~0,7!
		if "!st!" neq "Package" (
			del /a /f /q %%i
		)
	)
)
pause
exit
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路过

回复 10# lovekix 差不多吧，前面还要加set st=!file:~0,*!，*代表检测的字符的长度