So it's like this
They other day while i was gaming,
i dropped my mic on the floor and it broke

so went to buy a mic just now and hook it up (Sonicgear DM200)

the problems is that

my current Microphone is not as Clear as before
it also picked up music that i was playing in the background in the computer
and it still does when i turn off my computer's Speakers

also even if it still picked up my voice,
my voice sounds low in volume and the Bass of my voice sounds very hard, making my voice not clear at all.

I'm currently have a realtek HD sound manager and i dont know what to do with it to tweek my microphone to make my voice or recordings sounds clear
without picking up sounds from the computer. I would really love to have a mic that only pick up sounds from the mic itself and not from any other source.

what should i do? to optimise my microphone?

Thanks in advance

Try another mic. Maybe borrow one from a friend to test with