So I have a problem with my headphones. I own the Sennheiser PC 333D surround sound headphones, and it required software to work properly. I installed that and it worked perfectly for the past three months (its a USB soundcard that is attached to the headphones) but when I started up my PC this morning, it was gone. Usually it always appeared in the audio devices when I right clicked the sound icon but now it's not there anymore.
I have tried removing and reinstalling it but it still won't work. Does anyone know how I can get it to work again?