Any mic is going to produce at least some degree of static hiss. Of course, certain mics far more than others, but even room temperature can affect a static level. Mics will also pick up nearby ambient noise, such as a computer's internal fan.
It's the simple matter of knowing how to remove this unwanted noise and static. Most audio editing software includes a "Noise Removal" tool, which, when applied properly, can really work wonders.