Windows Installer 5.0?

Ok, so I was getting the error 1723 while trying to install Java. I looked around and thought I'd found a fix, I followed everything and deleted Windows Installer. However, I can't find a redist for Windows Installer 5.0 and apparently there isn't one. So my question is, where can I get the elusive Windows Installer 5.0, or have I messed things up? Thanks!

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