Thanks for the help topgundcp! I followed your instructions and found that the culprit is AppShellPage Class being run by Atheros Bluetooth Module 220.127.116.11, located in C:\Program Files (x86)\Bluetooth Suite\BtvAppExt.dll. I've just uninstalled the entire Atheros Bluetooth Suite since I don't use it.
- Windows 8.1
- Computer type
- System Manufacturer/Model Number