Though the headset worked, I experienced repeated crashes of the control software when using with Windows 8. I think it's fair to say that Windows 8 is supported, but you may run into some trouble with periodic crashing of the control app.
I've had problems with Win8 x64 and the drivers for this headset. I'll have a game open like League of Legends and then fire up Skype. Once I'm in the call the entire machine starts to bog down and I get terrible input lag. I had to switch back to a non logitech headset. Hopefully they fix the issue or it'll be the last set I buy from them.
I've had the headphones working on my Windows 8.1 laptop for 6 months and no issues. Every once in a while the Logitech Gaming Software sort of gets stuck (I have 3 total devices) but if I close it down and reopen it's fine.
It does work in Windows 8. If you are on 8.1 X64, the LG driver is not compatible; have set it to Windows 8 compatible mode and it worked for a while, but it doesn't work any more after the most recent 8.1 updates.
I have been having serious issue getting this product to work. It seems hit or miss. Check the logitech forums and beware before you purchase. It's unfortunate that so many people are having issues with this product.
Sort of - Windows 8 finds it and installs drivers and it works perfectly as a stereo headset. Logitech has not updated their software to work with Win 9 64 bit and the surround software does not install without a work-around. If you do manage to install it, it will not be very stable. I gave up and use it with the default drivers.
i'm using it on 8.1 right now, and it seems to work exactly as intended. the software, "Logitech gaming software v8.57.145" often crashes at startup however. disabling startup with windows and manually turning it on after all is loaded seems to keep it stable though.