How do I scan documents and save them as a Word/Excel/PowerPoint file?

To save the scanned images of documents as a Word, Excel, or PowerPoint file, you will need to install ABBYY FineReader for ScanSnap and change the specific profile settings.

You can install ABBYY FineReader for ScanSnap using the ScanSnap Online Update.

To start the ScanSnap Online Update, select [Online Update] → [Check for updates] from the [Help] menu in the main window of ScanSnap Home.

To change the profile settings:

1. Open the [Edit profiles] window.
   
   
   
2. Select the profile you want to change.
3. Select [ABBYY Scan to Word], [ABBYY Scan to Excel], or [ABBYY Scan to PowerPoint(R)] for [Send to] under [Application].

For details:
ScanSnap Help
(Select the model name of the ScanSnap at the top of the page)