I want to give you some more information about my problem. The whole error message is the following.
Arduino:1.8.15 (Windows 7), Scheda:"Arduino Uno"
C:\Program Files\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files\Arduino\hardware -tools C:\Program Files\Arduino\tools-builder -tools C:\Program Files\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files\Arduino\libraries -libraries C:\Users\USER\Documents\Arduino\libraries -fqbn=arduino:avr:uno -ide-version=10815 -build-path C:\Users\USER\AppData\Local\Temp\arduino_build_393399 -warnings=all -build-cache C:\Users\USER\AppData\Local\Temp\arduino_cache_953828 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avrdude.path=C:\Program Files\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude-6.3.0-arduino17.path=C:\Program Files\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc.path=C:\Program Files\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc-7.3.0-atmel3.6.1-arduino7.path=C:\Program Files\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA.path=C:\Program Files\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA-1.3.0.path=C:\Program Files\Arduino\hardware\tools\avr -verbose C:\Program Files\Arduino\examples\01.Basics\Blink\Blink.ino
C:\Program Files\Arduino\arduino-builder -compile -logger=machine -hardware C:\Program Files\Arduino\hardware -tools C:\Program Files\Arduino\tools-builder -tools C:\Program Files\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files\Arduino\libraries -libraries C:\Users\USER\Documents\Arduino\libraries -fqbn=arduino:avr:uno -ide-version=10815 -build-path C:\Users\USER\AppData\Local\Temp\arduino_build_393399 -warnings=all -build-cache C:\Users\USER\AppData\Local\Temp\arduino_cache_953828 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avrdude.path=C:\Program Files\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude-6.3.0-arduino17.path=C:\Program Files\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc.path=C:\Program Files\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc-7.3.0-atmel3.6.1-arduino7.path=C:\Program Files\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA.path=C:\Program Files\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA-1.3.0.path=C:\Program Files\Arduino\hardware\tools\avr -verbose C:\Program Files\Arduino\examples\01.Basics\Blink\Blink.ino
Using board 'uno' from platform in folder: C:\Program Files\Arduino\hardware\arduino\avr
Using core 'arduino' from platform in folder: C:\Program Files\Arduino\hardware\arduino\avr
Detecting libraries used...
"C:\Program Files\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10815 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\Program Files\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files\Arduino\hardware\arduino\avr\variants\standard" "C:\Users\USER\AppData\Local\Temp\arduino_build_393399\sketch\Blink.ino.cpp" -o nul
open NUL: Impossibile trovare il file specificato.
Errore durante la compilazione per la scheda Arduino Uno.
May be this additional information can be useful to solve my problem
Thanks in advance