Search function windows 10

Hi, are you using Cortana search or file explorer search?

Note the Cortana search bar really requires you to specify document search (options at the top of the window- see below).
Further, it will only find indexed documents.

Are you sure your epub docs have been indexed?

Were epub documents being found, and now not? If so, are they in the same folder?

I have just created a dummy epub doct in an indexed folder on H: and as you can see it's been found:

1. The file must be in a folder which is indexed.
2. This must be ticked for the folder of interest

3. This must be selected


These are the default settings. You should not need to alter them.

4. For content indexing to work for a file type, you need the appropriate 'ifilter' installed.
That indexing filter is what allows search to 'read' a file of that type.

Notice 'Microsoft Office Filter' next to doc.

In a very few cases you may need to search for and install a filter yourself.
An example I've found was Office documents (I don't have Office installed) and pdf documents. (By default, Windows has an ifilter for these, but installing other readers makes that hard to restore without a registry hack).

5. If using file explorer, that must be open 'above' the file of interest in the file tree.