Python 3.6 Installation failed

Question

I'm trying to install python3.6 on windows server 2016. I have downloaded python-3.6.6rc1-amd64-webinstall.Followed the default setting to install it. But during installation step I got the error message as 0x80070659-This installation is forbidden by system policy. Contact your system administrator. I have talked with system administrator but he is not aware of this policy. Can you please guide me to resolve this error?

• ZiTAL: you don't have permission to install it, you need administrator account
• curlpipesudobash: Left click and run as administrator?

Answer 1

I experienced this very same problem, and right-clicking the setup file, then Run As Administrator solved it. (Credit to @Igwilliams, who suggested this in the comments).

This was actually very frustrating for me, because I was logged in as an administrator, but apparently that still wasn't enough, I had to do the Run as Administrator thing as well.

• dumbledad: How might I uninstall the previous version, which requires elevation too?
• Liudvikas Akelis: My answer assumes you already have adminstrator privileges, are you saying you're being prevented from uninstalling python while being an administrator?
• dumbledad: Exactly so. In the end I deleted the directory and removed python from my PATH and then installed from scratch. Not ideal though
• user74696c: This solved it for me. The installer asked me for admin privileges, and I granted them, but it was not enough. It only worked when I used right-klick and run as admin. (Python 3.7.9-64 on Windows Server 2016)
• Cashiuus: As for uninstallation, I ran into same issue. When it fails, click the link taking you to the logfile. At the top, look for the binary that was executed, in my case "C:\users\primary\AppData\Local\Package Cache\{1babc3bc-6a32-44f7-bf4d-60eec36c9ad1}\python-3.6.1.exe". Navigate to this path, and you can right-click and launch this binary as Administrator. This time, uninstall will be successful.

Answer 2

Login to the system using admin credentials and try installing it. Or when installing provide admin credentials to install it.

Answer 3

• Run regedit
• Browse the registry to HKLM\Software\Policies\Microsoft\Windows\Installer
• Create DisableMSI, type: REG_DWORD, value = 0 (0 should allow you to install, it was originally 1)

• DABL03: As I understand it this disables the msi installer: Turn off Windows Installer
• js2010: @DABL03 "-- The "Never" option (value 0) indicates Windows Installer is fully enabled." Windows Server is value 1 by default, so regular users can't install unmanaged (non-dotnet) applications.
• YourPadre: This works for me The python installer (*.exe) extract some MSI files, when try to install them, it's the error after install as normal user, I changed the value to 1 for safety reasons

Answer 4

As @Cashiuus mentioned in the comments on the answer by @Liudvikas, open the logfile and navigate to the binary mentioned at the top-

The path should look like this:

C:\Users\ABC\AppData\Local\Package Cache\{5d57524f-af24-49a7-b90b-92138880481e}

Run the binary as administrator. It should uninstall properly now.