December 10, 2013 in answer
It seems you should first look a little closer at these two Operating Systems, which are somewhat like two different worlds.
For instance, the file manager used under Windows is called Windows Explorer, while the file manager used under Ubuntu is called Nautilus. If you compare these two programs, you wouldn’t even think of using Windows Explorer; and instead, wish you could use Nautilus under Windows — if you need to go there again
Secondly, you would hardly need programs like “Norton or McAfee Security, etc.” because Linux world is much more secure and Windows as you may have heard.
As for the others, they all have very good alternatives/equivalents in Linux world like LibreOffice, including Writer and Calc, which offer excellent word-processing and spreadsheet functionalities, Evolution or Thunderbird, which offer all email and communication functionalities, and so on.
Finally, in case you find that your needs are not fully met and you need to continue using this or that Windows app, you can install Wine, which provides an environment to run Windows apps under Linux, and you should check which apps/versions are supported and to what extent from here: http://appdb.winehq.org/