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Intranet

An intranet is a private computer network used to share part of an organisation’s information or operations with employees or partners; it is a website or websites, maintained internally, that are only accessible to authorised users.
Windows SharePoint Services or Sharepoint provides the means to put together an intranet. You can install SharePoint through the ‘Add/Remove Programs’ in Windows Server 2003 R2 or you can download the latest version compatible with your server OS from Microsoft website.

32-Bit vs. 64-bit

The terms 32-bit and 64-bit refer to the way a computer’s processor (also called a CPU), handles information. The 64-bit version of Windows handles large amounts of random access memory (RAM) more effectively than a 32-bit system. Because a 64-bit operating system can handle a large amount of memory (4GB or more), it can be more  efficient than a 32-bit operating system; a 64-bit system can be more responsive when running several programs at the same time and switching between them frequently.

Most programs designed for a computer running a 32-bit version of Windows will work on a computer running 64-bit versions of Windows. Notable exceptions are many antivirus programs, and some hardware drivers. (Microsoft Website).
You cannot upgrade from a 32-bit system to a 64-bit system without going through the process of reeinstalling Windows operating system.

Windows Firewall

Windows 7, Windows Vista, and Windows XP SP2 and higher have a Firewall built-in and turned on by default. A Firewall is a software program or piece of hardware that helps screen out hackers, viruses, and worms that try to reach your computer over the Internet.

To check your Firewall settings on a Windows 7 machine, go to Control Panel –>  Security –> Windows Firewall.