Your settings depend on where your microphone is plugged in adn what other audio devices are installed, mej.
There's no one, single answer for everyone. Only you can know what the correct configurations are for your system.
But, if you've got a microphone plugged into your computer and an internal microphone built into the computer, I'd definitely disable one of them. Most systems will automatically cancel their audio input if they're receiving it from two sources at once.
Just been there;
The microphone is an OUTPUT device in Realtek HD...listed as "Pink-in". Use Windows to enable it, then click Options>Advanced and you will find the Boost function.
Thanks to everyone for your help - I have disabled internal mic and sorted out audio settings.
However, I have another problem now!!!
When i playback the narration clips, there is a loud click at the beginning and end of each clip. I have tried in vain many ways of deleting the click, but it does not seem to be part of the actual narration clip. It is heard just before each clip begins and ends. Has anyone else had this problem and know how to remedy it?? I am using a standard mic lpugged into the front of my laptop, with the pink and orange plugs connected.
Hope someone can help??
This is usually an indication of an outdated driver for your sound card.
Go to your sound card manufacturer's site (not your computer manufacturer's) and download the latest driver and, if possible, firmware for your sound card.
Often, those "clicks," or "pops" are from electronic "switching" on the sound card. If Steve's advice does not correct this (good advice whether it does correct it, or not), I'd "process" the Audio to eliminate them in post processing.
The easiest way to do this would be to do all of your edits, as needed. When satisfied, Export just the Audio for the problem Audio Track. To do this, you will want to go to Audio Mixer, and Mute all other Audio Tracks. Export just the Audio (now, only your Narration, or wherever your narration is located) as a PCM/WAV 48KHz 16-bit file. Bring this combined WAV file into a program like Audacity and edit out the pops and clicks. Note: some other audio editing programs make this even easier, but they are not freeware, like Audacity. I use Adobe Audition (has a Restoration Preset - Repair Transient), but it is anything but freeware. One little program, that does a wonderful and automatic job of repairing transients (your pops and clicks are transients), is Magix Audio Cleaning Lab. It is inexpensive, but works perfectly for clean up like this.