Yes, the application works in Windows 8.1 but you will need to acquire the latest version of the software. According to the official website, the software is compatible with the following system requirements: Windows 8 32-bit or 64-bit Editions, Windows 7 32-bit or 64-bit Editions, Windows Vista 32-bit or 64-bit Editions with Service Pack 2, Windows XP 32-bit Edition with Service Pack 3. For more information, access the official website of the product. Omnipage has reached version 18. I believe you will need to upgrade your version in order to use it for Windows 8.1.