hi, i have windows 8.0 please be easey with me as i am not a computer expert, when i record an album its ok but i get a background echoeing noise and really bad when tracks end what is this noise.please help. 
How are you recording? Please give details of your set-up. Model numbers are good, plus a description of what is plugged in where and what settings you have made.
it is an envio usb turn table, and i am using hp pavilion laptop windows 8
Follow everything in this page Audacity Manual.
You may be recording from the wrong recording source - you want to choose the USB Audio CODEC for recording device in Audacity’s Device Toolbar. For playback device you want to choose your computer speakers.
If the noise persists you may have a bad or loose USB cable. That is common.
Gale