If you are a hardware archivist running an old system (Windows 7 or 8.1 with an NVIDIA GTX 980 or older), there is one reputable method that does not require a serial.
To use NVIDIA 3D TV Play, users need to obtain a valid play unlock code. This code is required to activate the 3D TV Play feature on your NVIDIA graphics card. Without a valid play unlock code, you will not be able to experience 3D content on your TV. Serial for nvidia 3dtv play unlock code
The simplest way to "unlock" 3DTV Play for free is to install the last driver that officially supported it. If you are a hardware archivist running an