While I'm playing with my friend e.g. Fortnite it rustles when he starts to talk or say nothing it comes from me or from him. And how can you fix the error
Well. Most of the time, when a microphone / headset is rustling, it's because it's not good enough.
That means if you want to fix it you would have to buy a new one.
I could definitely recommend the Auna mic 900b.
I have this microphone myself and I'm extremely satisfied with it.
Doesn't cost too much either
PS I hope that I could help you and would be happy about a positive review!
Skype is bad. Tried discord
Your mic should be deprived
If it smokes, I would throw it away immediately! And if there's noise, the mic is probably not good. If it starts to rustle when you start to speak then there's also a gate active that regulates your tone if you don't say anything and only opens when you say something. However, this still means that the microphone is not good.