My Sennheiser U320 Headset (USB) was working just fine at around 1:00 last night, but when I woke up, they just stopped working. I know it isn't a problem with my headset itself because I plugged it into my brothers computer and my stepdad's computer and the headset worked just fine on both computers, but not mine. I have an Acer Aspire Z All-In-One computer and I have RealTek audio. I run Windows 10 Home Insider Preview, but I don't think that's the problem because as I said my headset worked just fine last night. The audio works just fine coming out of my computers built in speakers, but my headphones don't. Please help me!