Why can Windows Installer not be accessed and how can I fix it?

Gordon August 27, 2010
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I have been having trouble with my Windows Installer. It said Windows Installer cannot be accessed. Then it says fatal error. I have made sure it was on and can interact with my desktop.

Also, I got this other error “error 1603: a fatal error occurred during installation”. Are they related? I would like to fix them both if possible.

  1. Oraljohn
    August 27, 2010 at 11:07 pm

    Microsoft has a couple of solutions for this. Visit http://support.microsoft.com/kb/315346

  2. Josh Fox
    August 27, 2010 at 6:19 pm

    The question about Windows installer has already been asked here.

    Chances are, both problems are linked.

    You didn't mention what version of Windows you are using, but Microsoft has a knowledge base page about this in XP with considerable detail.