gresleyman:
I have have checked in the tools menu, and it states i have connected a Arduino UNO, it is on Com port 8 and the programmer is set to ArduinoISP.
No it does not 
It states YOU selected that, no matter if that's correct or not 
And when using the USB on a Uno/Nano and the normal upload button, the programmer selection doesn't matter.
Question, if there is no Arduino connected, what does tools->Com-port show? And when you connect an Arduino? (Hint, there should be one COM-port extra when the Arduino is connected.