Sounds like it is the audio input. You could either get an audio card or get a new motherboard?
Another question, are you using the input audio on your case or from your motherboard?
I don't know why people say to avoid SteelSeries... I've had two headphones from them (v2 and Siberia 650) and I've loved both. I was going to suggest SteelSeries.
I have no clue what 'truthfinder' is but I don't think it is a virus. It could be an extension or something. I found this on reddit about it. Please read the comments on it. (https://www.reddit.com/r/antivirus/comments/6cnk77/does_anybody_have_any_experience_with/)
However, an easy way to avoid...