yes, mine was working under Windows 8.1. Just go to settings and system recovery. There you can find a way to reboot Windows in recovery mode or something similar (you can find guide Googling "disable driver enforcement Windows 8.1" ). After disabling that Windows feature just install mango USB driver and the Dac will works. I'm using Windows 7 now and the drivers are no longer working even disabling the driver enforcement.. I'll continue to use my Xfi HD USB..
Oh, I just googled and followed some instruction to get the driver install correctly, it does prompt that unsigned driver window and I just click install anyway.
Well, now it appear like this.
http://i6.photobucket.com/albums/y225/wildwestgoh/temp/dx50-win8-driver-install_zps165e4475.jpg
It appear working but... not working?
p/s: Sorry for the link, can't post picture with my current account level. :rolleye:
p/s 2: Got this second as someone let go cheap... he told me can use as DAC, oh well, hope iBasso can come out with a proper driver soon, want to try out watching movies and... hehe... gaming. =X