Windows的环境变量
WINXP 7 8 10和PE里面都有的变量是
%systemdrive% SystemDrive=C:
%windir% windir=C:\Windows
%SystemRoot% SystemRoot=C:\Windows
%USERPROFILE% USERPROFILE=C:\Users\Administrator
%COMPUTERNAME% COMPUTERNAME=SXWIN10-E304DVL
%TEMP% TEMP=C:\Users\ADMINI~1\AppData\Local\Temp
%TMP% TMP=C:\Users\ADMINI~1\AppData\Local\Temp
%ComSpec% ComSpec=C:\Windows\system32\cmd.exe
%USERNAME% USERNAME=Administrator(XPPE没有）
