Uno not working

Hi using windows 7 64 bit, on dell studio 1749.
Plug In genuine uno r3.
Two boards. one smd chip On this board 2 red leds flashing
Second board plug in AT328P. The green led on. Yellow led on. Press reset yellow led flashes on/off a number of times(fast) then stays on
On both boards verify a sketch say "blink".
This message appears :-
Arduino: 1.8.8 (Windows 7), Board: "Arduino/Genuino Uno"
exec:
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
"C:\Users\saltov\AppData\Local\Arduino15\packages\arduino\tools\avr-gcc\5.4.0-atmel3.6.1-arduino2/bin/avr-g++": file does not exist
Error compiling for board Arduino/Genuino Uno.

How do you justify the topic's title?

Title was mine AWOL split it from a sticky in the create editor.
Was in wrong section and on the wrong sticky.

Mea Culpa.