WiX 3.6: A Developer's Guide to Windows Installer XML

The small update

A small update is like a minor upgrade except that it's usually smaller in scope. You might use it when only a few files have changed and you don't intend to change the Product element's version number.

The steps to create it are the same as when creating a minor upgrade patch with the exception of not changing the Product element's Version. They are as follows:

1. Using Candle and Light, compile and link your original installer into a .wixout file.
2. Make changes to your software's files and then create a second .wixout file. Do not change the Product element's Id or Version attribute.
3. Make a Patch.wxs file and, using Candle and Light, compile and link it to create a .wixmsp file. Set the PatchFamily element's Version attribute so that ...