Windows 7 seems to locks cmd files after execution.

I was not able to reproduce this on other windows 7 machines but for some reason if I execute a cmd file I can't edit the file after execution.  It tells me the file is locked by another process. I used Unlocker and it says that the System process has it locked.  If I wait like 5 mins or so it will release but it's really, really annoying.  Does anyone know why the system would be holding on to the cmd file after execution completed?  

Thanks,

Jeff Sessions