MrZoldiK said:
Thanks for the reply .

I tried all of this methods , I know how to change the default browser , it was working in the past but now not !
see the photos I uploaded to Explain the Problem and to see what I do .

thanks again

MrZoldiK
After literally hours of frustration, I stumbled onto this:
I went from 'Control Panel' to 'Default Programs' to 'Set Program access and computer defaults'. There are 3 radio buttons: Θ Microsoft WindowsΘ Non-MicrosoftΘ CustomI chose 'Non-Microsoft', which allowed me to set Google Chrome as my default web browser.I also un-checked the box across from Internet Explorer which said 'Enable access to this program.'
Voilá -- Google Chrome shows up as the default in the 'Associate a file type or protocol with a specific program' screen.