There is no information on its official webpage, that can assure you ArcSoft TV works with Windows 8.1. I suggest you to perform a fresh installation of this software, and after that try the compatibility mode: Right click on its executable file > Properties > Compatibility tab. Select from there a previous Windows version and hit Apply. If this program still doesn't work after you pass all these steps, I recommend you to send an email to the developer at: [email protected] and ask him about ArcSoft TV compatibility.