microphone issue

Hello everyone, So I recently build my first PC of which I am very proud. However immediately after plugging my headphones I noticed the sound was much quieter than when I used them on my laptop, my friends also kept telling me my mic was quiet. I didn't think much about it then but lately it...

my mic doesnt pick up sound from the outside anymore but instead it now plays my pc sounds meaning that if im in a call with someone on disc they cant hear me but they can hear my music... how can i fix this? i tried reinstalling drivers, disabling stereo mix, plugging it off and on again and...

I have a dell optiplex 790 and I don’t have a pump header for my cooler master liquid lite 120 what should I do