1.i Uninstall everything of python with advance uninstaller . ( register file and ...) 2.i download the last version of Python from python.org 3. i add the Include PATH file when start the installation of Python.
BUT I don't KNOW WHY ITS NOT Installed !
Error Code 0x80070643
I found it.
if you are not administrator of the system , and change the location of installation , for example (c:\python) this error will be appear . so you must be install python on (c:\users\'your username'\App Data\Local\Programs\Python)
and after installation python go to system environment and add the path into this.