Did you search the forums for your error message or part of it ? eg. "avrdude: stk500_recv()"Is it a REAL arduino or a clone ? (if unsure post decent quality pictures)What operating system ? (if its a mac i'm outta here)Have you tried it with everything disconnected ?Have you tried a different USB cable ?Are you connecting via a USB HUB or directly ?How are you powering it ?Can you see the device in your OS ?Can you select the COM port in the IDE ?Which IDE version ?"Bootloader" a small piece of code/firmware/software that starts/initialises the rest of the system prior to running other software/skectches/operating systems. An abstract software layer between hardware and software often used to define hardware handshakes / paths. Usually hardware specific.
1 Check that the L LED blinks 3 times when you open Serial Monitor in the IDE. 2 Do the loop back test, which is described in one of the pinned posts at the top of the Installation & Troubleshooting forum. Let us know how that goes.3 In the IDE preferences, checkmark show verbose output on upload. Show us the complete output that is shown to you in the bottom of the IDE window when you try to upload the blink sketch. What other Arduinos do you have?
Now, I received a true "Arduino Uno".
I do not know what this means. Do you have another Arduino that works? Or both do not work?It is better to copy and paste the text of the error messages rather than pictures, because it is not likely a large number of people would want to or have the ability to copy an http address and paste it manually into an address bar of a browser. I do not know the solution to this particular problem. You may want to post your question in the International section of the forum if your language is represented there, so there will be people who can read and understand the parts of the error messages that are not in English.