Ok, let me try and explain it again. I can open the Arduino IDE, and it looks fine. I open the Blink sketch under File/Examples/Basic/Blink.
It opens up in a new sketch window. THEN, I cannot upload it to the UNO, and yes, I have checked all that. So I tried to just verify the sketch using the verify button. That gives me the errors I posted earlier. So, no upload, errors, no verify, same errors. None of the 20 or 30 sketches I have running on other finished projects will verify, either. There is something missing in the program, I think!