def ecmd(cmd, r=False): import ctypes class disable_file_system_redirection: _disable = ctypes.windll.kernel32.Wow64DisableWow64FsRedirection _revert = ctypes.windll.kernel32.Wow64RevertWow64FsRedirection def __enter__(self): self.old_value = ctypes.c_long() self.success = self._disable(ctypes.byref(self.old_value)) def __exit__(self, type, value, traceback): if self.success: self._revert(self.old_value) from subprocess import PIPE, Popen with disable_file_system_redirection(): OBJ = Popen(cmd, shell = True, stdout = PIPE, stderr = PIPE) out, err = OBJ.communicate() ret=OBJ.returncode if r: if ret==0: return out.strip() else: return err.strip() else: return ret print ecmd('C:\Windows\ccmsetup\scepinstall.exe /u /s', True)