After ahving tried out many solutions found on either this forum or Ggle, I checked on the apache error.log there was a htaccess problem ...
stuck at 56% on the install, I checked permissions on the .htaccess(which is at the www root), and it was on chmod 600.
....
So I changed it to 644 and clicked on restart the installation !
...
It worked out for me, the install process went all throughout its way successfully.
I dunno if this is a "good" clue so please let me know if this a right way to do it