Did you select programmer type to arduinoISP as the programmer type before you hit burn bootloader?
That's it. Thanks. I'm looking over the instructiosn and I don't see where it said to select the programmer type. I've never looked at the menu option before I don't think. Somehow it was the correct option when I'm downloading sketches to my Uno.
Two diffferent animals at work there. When you do a normal upload of a sketch to your attached Uno board, you are not using any programmer, you are rather required to select the proper com port for your arduino board attached to the PC usb port.
When you are using a ISP hardware programmer your target arduino board is not directly connected to the PC's usb connector, rather it is connected with wires or cables to a programmer (which can be a another Uno board running the arduinoISP sketch) and in that case there are only two methods to use the IDE, either burn bootloader or upload sketch using programmer.
So bottom line, when you are using normal uploading of sketches you have to select the proper com port, but do not have to select (or if you already did, it isn't used) a programmer type. When you are using a programmer you have to select the proper programmer type, but not required (or if you already did, it isn't used) to select a com port.
That make sense?