Solution for “The Windows Installer Service could not be accessed.” Fix

Many users have expressed a problem with there desktop or laptop running Windows Vista 32bit & 64bit reciving the following error message when attempting to install a program.

The Windows Installer Service could not be accessed.

This problem can be normally solved by executing the following commands in the Run Prompt (Start -> Run, or press Windows Logo + R on your keyboard)

Run:

msiexec.exe /unregister

Then after executing that command run:

msiexec /regserver

That should resolve your problem, if it does not then the service for Windows Installer may not be started, open the run prompt once more and then type in

services.msc

Search the list of services for Windows Installer Service, then right click and select “Start” that should resolve the problem.

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