SCL: 3: 1. List down all the operating system used in a desktop/laptop today and find good descriptions of how operating systems work? Hence, state their advantages and disadvantages.

The operating system that usually used in a dekstop/laptop today are:

Windows 7

How it work :

          Windows 7 was intended to be more focused incremental upgrade to the windows line, with the goal of being fully compatible with applications and hardware with which windows vista is already compatible. For example, one of the features of windows 7 is jumplist. Jumplist gives the option to view a list of recently accessed files by application is not open, by right clicking on the application’s icon in the taskbar. it is also allow to quickly accesed a favourite playlist without opening media player.

Advantages and disadvantages :

Advantages	Disadvantages
Windows 7 is faster than its predecessors, both in terms of installation and boot up time	It is expensive than the previous Microsoft operating systems.
WordPad in Windows 7 has improved much better and look similar to the Microsoft Office Word. It can be used to open, edit file names with docx extension which was earlier introduced with MS-Office 2007. Word prediction is the new feature in Word Pad. Realistic brush has been added in Paint.	some of the features like Start Menu user interface, Windows Ultimate Extras, InkBall, Windows Photo Gallery, Windows Movie Maker, Windows Calendar Windows Mail called Windows Live Essentials were included in Vista are removed in Windows 7.
Windows 7 supports Virtual Hard Disks with the support of enhanced performances of multi core processors.	some of the users have problems such as; their system hangs after installing Windows 7
. Windows 7 supports Virtual Hard Disks with the support of enhanced performances of multi core processors.	users have problems such as; their system hangs after installing Windows 7