I guess I am in bad luck! Tried disabling the Avast antivirus, uninstalled and reinstalled ITunes, cleaned the registry, and still were not able to backup. The other computer I have is a Microsoft Surface tablet were I installed ITunes and tried to backup, and it did start to work there, but I did not have enough disk capacity to fully backup the phone and got aborted. Could not find a way to make ITunes backup on an external drive neither. Did find out though, that something most be corrupt in my main computer which is not allowing the backup, and do not see a logical reason for that. I have had the Avast antivirus for years now and there were no issues ever until the last few months now. I do not have a large capacity in Icloud neither to hold the phones data. Would this be a normal behavior to other users? Thanks!