Here is exactly what I did :
Selected " allow all " for my personal firewall software to make sure there is
no connection issue during install .
I did not used Windows CD/DVD autoplay option when popping disc in to drive
but opened manually disc files ( not that much difference anyway ) , then
clicked on Steam " Setup " shortcut and that did bring a small CloD install window ,
then clicked on install CloD option and Steam started to install ( I did not have
Steam installed at all up to that point ) .
The next thing it asked me shortly after if I want to use existing account or creating
a new one and since I forgot my previous login name and password from a
long time ago I selected to create a new account .
After entering all the necessary required stuff I clicked to proceed but was
returned back to previous install progress window telling me my account
e-mail address is already registered Ooops ! I registered about 7 years ago but did
not really used Steam at all

So I just selected creating a new account option again using a different
e-mail address with user name and then got through installing Steam without
a hitch which right after it was installed asking me for the CloD key number
which I typed exactly as it is on the included piece of paper inside the box
XXXXX-XXXXX-yada yada yada.......and after two seconds it was success giving
me finally option to start installing CloD .
That's it , a little hiccup with creating a new Steam account but success .

I must have been lucky after reading recent posts , I thought I will meet the
same fate but it worked .
So far the game experience is now for me the biggest shock
