64bit or 32bit – There are two core flavours of Windows 7, 32bit and 64bit. Both appear the same to the user but under the bonnet they operate differently, in particular how the applications run, hardware is recognised and used. The reason that Microsoft has introduced this new 64bit flavour is because in coding terms 32bit operating systems (e.g. Windows XP) have hit the ceiling, this means they can no longer support the new computer chips, memory and other hardware we use nowadays. 64bit operating systems can function with new and emerging hardware and will continue for many, many years to come. Therefore we highly recommend the 64bit edition of Windows 7, to ensure you future proof your computer system. Note: The next edition of Windows “Windows 8” will only be 64bit.
Applications compatibility - As Windows 7 has undergone some fundamental changes, it is likely that you will have some applications that do not work after it is installed. It is our advice that in advance of moving to Windows 7 you test to see if all you applications work, this can be done on a spare computer if you have one.
Hardware Compatibility – As discussed previously, unless your hardware such as printers and computers, was produced in the last year or so, it may not be compatible Windows 7. This could result in you being able to install Windows 7 on your PC or stop your peripherals from being recognised. Microsoft have provided a very handy tool that can be run on any computer to check to see if it is compatible before trying to install windows 7. The tool can be downloaded from here and Microsoft also has a website here that allows you to browse through a list of supported hardware, including externally connected peripherals