Unable to install python on Windows


I follow this tut to install python on Windows 7 (64 bit). But I get an error: 0x80070643: Failed to Install MSI Package: enter image description here What's wrong? P. S. The 1st and 3d methods of this guide have not worked for me.


Should I tick up Add Python to PATH box? enter image description here

Update 2

I've doanloaded the x86-64 embeddable zip file, unzipped it into Python35 and now it works.

asked on Stack Overflow Nov 2, 2016 by Igor Savinkin • edited Nov 2, 2016 by Igor Savinkin

3 Answers


Close the installation program and follow:

  1. On the desktop, press Windows key+R to open a Run dialog.
  2. Type msiexec /unreg, and press Enter.
  3. Follow the first step again.
  4. Type msiexec /regserver, and press Enter.

In this link you can find more information.

answered on Stack Overflow Sep 7, 2017 by Miguel Hernandez • edited Sep 7, 2017 by Fabrizio

Choose 'custom install' & checked all options.

If you choose debug option , someone will require you install vs2005 above.

Click 'next', it'll work for you.

answered on Stack Overflow May 3, 2018 by Velunce
  • Go to Task Manager -> Details Tab -> End Task 'msiexec.exe'
  • Try install again.


answered on Stack Overflow Feb 20, 2020 by Jack Williams • edited Feb 20, 2020 by MaxiMouse

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