I have Windows, no sound card, and at first when i statred using it like a year ago it worked fine but after a month wierd stuff started happening
What kind of weird stuff? From looking at some of the Logitech posts in their forums, it seems they have some issues with their USB headset/mics in applications that use vox.
Since it is a USB headset, it won't cause an IRQ conflict with your existing on-board sound card. Also, since it is USB and it requires a powered USB port, it maybe an issue of not getting sufficient power. If you have one nearby or can get access to one, connect a powered USB hub (make sure the hub states 5Volts, which is the standard) to your computer and then plug the USB headset into the powered hub and test it to see if the problem exists.
If it does, disconnect it and again, if there is one available, connect a normal microphone to your onboard sound card and try that in AH and see if that boots you out of the game as well.
It also almost goes without saying that you should make sure that you are using the latest drivers for your USB headset. You can also test out the microphone using the the microphone wizard in Windows or through the DXDiag applet (click on the Network tab in DXDiag and click on the wizard button).
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