Running a reliable operating system on your laptop computer is something that most people never give much of a though about. Basically many users know that their computer runs Microsoft or Windows or maybe XP. Some people might tell you that their laptop runs Windows Vista and then that is about all that they know about the operating system itself. The reference to Windows is the same thing as Microsoft in that they are actually the company that produces the various Windows operating systems found on most personal computers around the world today.
For most of the used laptops in Australia as well as other countries the Windows OS is the most popular that you will find. There are plenty of people who will have a variety of opinions as to just what the best operating system is for a personal computer but as far as popularity referring to sheer volume Windows is by far the most popular on desktops and laptops around the world. There are various versions which are quite popular on the laptops for $100 price ranges and these are typically the Microsoft XP version of Windows which has had several Service Packs released. Some may have Vista and others may have Windows 2000 or even 98. These are all decent at what they were designed to do right out of the box and still work well for various tasks like creating docs and spreadsheets. It is a good idea to keep up with the Service Packs for each specific OS so that your computer remains patched from any known issues.