• Describe the scenario and benefits that the feature supports.

When gathering information for a custom bootstrapper UI you may need to run as administrator in order to read certain registry keys or configuration files. In my particular use case I need to gather information from another vendor's registry entries and they had removed the read permissions from the User group. Only by elevating to admin could I read those values to bring into the UI to help the user configure our product.

• Describe how you're accomplishing the feature today (if possible).

Creating a standalone EXE with a manifest that forces elevation and calling that from the boostrapper. This presents the user with multiple UAC prompts instead of one.

• Describe what you'd like the new feature to do.

When using v4's new bundle extensions #5539 support running them in an elevated mode. Ideally this would elevate the engine so that the user is only presented with a single UAC prompt.