Windows installer not working

[notevines]

Hi,

Since installing win 11, I have lost the ability to install .msi files.  Everytime I try I get the following error:

This is installing programs like Hugin or Blender. When I try to run as admin, I get the following:

I have tried, starting/stopping in the services.msc,  and unregistering/re-registering the windows installer. My windows is up to date.

Can anyone suggest anything else to try?

[#2]

Hello,

Try registry based FIX 3 mentioned here, see if it helps (works with Windows 11):

https://www.kapilarya.com/error-1719-windows-installer-service-could-not-be-accessed-windows-10

Hope this helps!

Note: Included link in this reply refers to blog post by a trusted Microsoft MVP.

[#3]

@Kapil Arya Thanks for the suggestion, turns out I don't have WOW64.

Unsure if this is what is causing the issue, if it is I wouldn't know how to go about fixing it. Just tried google and couldn't really find anything

[#4]

@notevines same issue

[#5]

Uninstall windows and look up your product key. Then install it to a external drive then transfer it to the unit for reinstall.