0x80070643 Failed to install MSI package

Python Help
1

Hello everyone,

This is my first time to install python on my new computer and the OS is Win11 (64bit). And there is no python installed before.
I tried to run python-3.13.3-amd64.exe as an Administrator, but the installation failed with error 0x8007643…
So I checked the log file and found the following messages:

…
Error 0x8007-643: Failed to install MSI package.
Error 0x8007-643: Failed to execute MSI package.
Error 0x8007-643: Failed to configure per-machine MSI package.
…

I checked the Windows Installer service and make sure it should be okay.

I tried to use switch /layout and pre-downloaded all components on my machine.

And I tried every possible way I can think, like folder permissions, user privileges, disk check or whatever, but it still failed with the same error…

So I think if there is anyone encountered the same problem and someone has found a good solution to it.

If you happened to know how to solute it, could you share it with me?

Thanks in advance,

Best regards,
Cheng Peng

2

If you have the same Windows 11 Home Edition as me, have you enabled Developer Mode?

3

My Windows is Windows 11 Professional 24H2 and Developer Mode is enabled.
But nothing changed…

4

You’re not running an x64 installer on a new Windows ARM machine?

5

No, my machine is x64 and the installer is amd64. Sometimes it’s easy to confuse amd with arm…:slight_smile:

6

I was just ruling that out. That error code has lots of hits on Google, so you’re not alone. I didn’t find a common cause though, just suggestions to try a repair option in the installer, or the old power cycle.