Go to: portableapps.com/apps/utilities/camstudio_portable
Download and install "Cam Studio".
Make sure to test Cam Studio before you make a recording you want to keep!
Every time I don't test it first, I end up re-doing my work. :-(
This is what Cam Studio looks like when you first run it.
Select the size of the screen
Plug in your microphone before the next step!
Under the "Options" menu, make sure to select:
"Record audio from microphone".
About Portable Apps
These applications are specially built to be 'installed' on any Windows computer. They do not require administrator privileges, as they don't do a 'proper' Windows install.
So, since you'd like the advanced options...
Here are some ways you can capture longer video --- but it means less "frames per second" so don't click too quickly!!!