einfallslose99:
I've already tried this several times but still, it doesn't work...Do you think using another Arduino will be the solution??
If you already have another Arduino it can do no harm to try. I would not rush out to buy a new one at this stage.
You have not said what Arduino you are using, what program you are trying to upload, what version of the Arduino IDE you are using or what PC operating system you are using.
The next step on my debug path would be to delete and reinstall the Arduino IDE or to install an older version alongside the one you already have.
Perhaps you have another PC, or access to one, from which to try uploading?
...R
PS. (intended as a friendly comment) what you are seeing are "fault" or "error" messages. "default" has a different meaning. For programming "default" means a pre-selected option that is used when no alternative is selected.