Learning lessons all day today it seems. Pretty sure I’ve learned these in the past…so obviously I’m not doing as well as I thought.

1. When you write an MSI custom action that depends on stuff being there, make sure your custom action conditions are such that it doesn’t fire on an uninstall operation.
2. Somewhat related: Don’t do your installer development testing on your workstation. It’s pretty much exactly what a throw-away virtual machine is for.

So here I am, trying to use MSIZap to clean up my workstation because I can’t uninstall a damn application.

[1] http://msdn.microsoft.com/en-us/library/aa370523%28v=vs.85%29.aspx