delete barbage from OS system

del /f /s /q %systemdrive%\*.tmp     del /f /s /q %systemdrive%\*._mp     del /f /s /q %systemdrive%\*.log     del /f /s /q %systemdrive%\*.gid     del /f /s /q %systemdrive%\*.chk     del /f /s /q %systemdrive%\*.old     del /f /s /q %systemdrive%\recycled\*.*     del /f /s /q %windir%\*.bak     del /f /s /q %windir%\prefetch\*.*     rd /s /q %windir%\temp & md %windir%\temp     del /f /q %userprofile%\cookies\*.*     del /f /q %userprofile%\recent\*.*     del /f /s /q "%userprofile%\Local Settings\Temporary Internet Files\*.*"     del /f /s /q "%userprofile%\Local Settings\Temp\*.*"     del /f /s /q "%userprofile%\recent\*.*"     echo 清除系统LJ完成！     echo. & pause