Windows Desktop Search is an indexing and searching utility from Microsoft that will help you locate documents, spreadsheets, presentations, e-mail items, contacts, attachments on your computer or connected network.
Access it by pressing the Windows logo key + F.
The program's PDF indexing filter can become available for Windows Desktop Search letting you index and search your PDF files, including image-only PDF files.
By installation default, the Kofax filter is not enabled, but it can be enabled with a Custom installation. To enable it after installation go to File > Options > General > Integrations. You can also set preferences for handling PDF pages without a text layer (for instance to use OCR).
Windows Desktop Search displays a search field with the ability to set search criteria and filters.
For more guidance, please consult Windows Help.