To save images as Word, Excel, or PowerPoint files, you will need to install ABBYY FineReader for ScanSnap.
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 windows of ScanSnap Home.
To convert the saved images to Word/Excel/PowerPoint files:
ScanSnap Help
(Select the model name of the ScanSnap at the top of the page)