It seems you have used the Windows 8 based "Metro" App (Webcam Security Camera). The Metro App, or "Windows Store App" downloaded from Windows Store is optimized for tablets, it cannot fully utilize your PC's capabilities.
If your computer uses an Intel-based processor, it is much better to use our desktop software - CameraFTP Virtual Security System (i.e. VSS). VSS supports multiple webcams and IP cameras. It is a more secure and scalable NVR solution. For more info, please visit:
VSS can be downloaded from our software page for free.