MSI Error 25543 when installing SPF Update Rollup

When trying to install an Update Rollup for SPF through Windows Update you may run into a Failed installation. And running the update manually gives a MSI Error 25543 where you have to click the Ok button like 10 times before it abort.

I’ve solved that at three different occasions by just stopping the IIS “Internet Information Services” and then installing the update manually.

Remember to start IIS after the update is installed and verify the bindings for SPF is still correct (there has been occasions where there have been duplicate bindings).


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