Computer Systems Essay

Explain the function of the schema unit comp mavennts and how they communicateCentral make foring unit The Central Processing Unit (CPU) carries out the echt processing of data. The data it processes is gathered via the system bus, from the main shop. The CPU then sends back the results to main memory via the system bus. The CPU also wangles and quantifys the operations of the other key comp unmatchednts. CPUs mapping in their operation Fetch, decode, execute, and drop a lineback.BIOS The BIOS is a built-in softw be that decides what a computer can do without having rise to office to a voteless drive or CD/DVD. On PCs, the BIOS contains all the code invited to control the key identity card, display screen, disk drives, serial communications, and a number of other miscellaneous functions.Motherboard The motherboard is a printed circuit board (PCB) that houses and controls the components that ar in charge of processing data. A motherboard provides the electrical circuit connections, these circuits are used by other components of the system to communicate. The central processing unit and other subsystems much(prenominal) as real time clock, and various peripheral interfaces are also located on the motherboard.This is motherboard doesnt use active passionateness square ups on its bridges instead it uses a complex passive waken sink.Power Supply A power preparation unit (PSU) is the component that supplies power to a computer. In a PC the power supply is the metal box usually found in a corner of the case. The power supply has many various power leads all for incompatible things such as* 20+4pin power joiningo Powers the motherboard, depending on what motherboard you pass water way it allow either require a 20pin or a 24pin connector.* 4+4pin ATX 12V Connectoro Powers the CPU, depending on what motherboard you have it will either require a 4pin or a 8pin connector* 6pin PCI-E VGA card Connectorso Power modern graphics cards, depending on t he graphics card it will either require 1 or 2 6pin connectors.* SATA Connectorso Used for most internal components such as SATA hard drives and SATA optical drives.* 4pin peripheral Molex Connectorso Molex connectors are used for fans, lights and various other internal components.* Floppy connectorso Used to connect floppy disk drives.Heat Sink & Fan A heat sink is specifically intentional to reduce the temperature of an electronic device by releasing the heat into the surrounding air (case fans would then push out this hot air while pulling in cool air). All modern CPUs take a heat sink and most heat sinks require a fan. A heat sink without a fan is called a passive heat sink a heat sink with a fan is called an active heat sink. Heat sinks are chiefly made of an aluminium alloy.This picture shows various heat sinks used for devices like the CPU, graphics card, bridges on a motherboard and much more(prenominal). Depending on how hot a device crushs an extra fan may be requ ired, the CPU, graphics card and motherboard all tend to use active heat sinks.Hard harrow obtain The hard disk drive is non volatile memory storage that uses a mechanism to read and write data on a hard disk. E very modern computer contains one or more hard disks. The purpose of the hard disk drives is that they give computers the ability to remember things when the power goes out. A natural modern background knowledge machine will have a hard disk with a efficiency of between 250GB and 1TB. Data is stored onto the disk in the form of files. The master (typically C) is the primary drive, which the computer uses to mention up, the slave (D) is usually used for extra storage and buck ups.Integrated tantalise Electronics (IDE) Floppy drive, hard drive and the CD-ROM drive are all connect to the computer through an Integrated Drive Electronics (IDE) interface. An IDE interface is a standard way for a storage device to connect to a computer. sequential Advanced Technology Attac hment (SATA) Is a computer bus interface for connecting host bus adapters to passel storage devices such as hard disk drives and optical drives. SATA speeds are far greater than IDE and the coat difference means they are easier to manage and dont restrict air flow, so most modern computers tend to use SATA everyplace IDE.The size difference between IDE (left) and SATA (right).Describe the purpose, traces and functions of two different operating systems.Windows 7FeaturesFeatureDescriptionUseful?1 SnapSnap lets you drag one window to the left and one to the right, allowing you to see two windows side by side.Very much, I imagine this feature alone makes Windows 7 stand above the rest.2 TaskbarA remake of the old taskbar that introduced some new features such as pinning, this allows you to pin a application to the taskbar ( convertible to Mac dock)Again this is a very useful feature, you can pin as many applications to the taskbar as you wish.3 Thumbnail PreviewsExactly what it s ounds like, thumbnail drones allow you to preview a window that is minimised or behind another window, it is also the new way to group similar windows.This feature is helpful if you have multiple similar windows unclouded however if you just have one or two windows open its not so great4 rebound ListJump list lets you access your recently used files, depending on the application you can see your most play music (media player) or recently opened documents.Handy for some applications although not a key feature in my opinion.5 Aero peekThis feature allows you to make all open windows transparent this lets you view your desktop without minimising all your windows.This is another feature I love, I tend to save quite a dole out of downloads to my desktop and organism able to flick back and forth without minimising is great.1 Snap2 Taskbar3 Thumbnail Previews4 Jump List5 Aero PeekUndertake routine maintenance tasks in congress to a PC.I will show you how to carry out several forms of maintenance, software, hardware and file management. bundle maintenanceTo demonstrate software maintenance Im going to up leave my antivirus. To bag the process you beginning need to load up your antivirus (Im use NOD32).Once the main antivirus window is open I need to navigate to the update option.Fortunately my antivirus does not need updating as my original virus signature database is up to date .This is what happens when its not up to date, after a straightaway download it will take me to the previous pageboy and let me know if its up to date. hardware maintenance.To demonstrate hardware maintenance Im going to find and use a newspaperwoman that is connected to a separate computer on my network.How I installed the printer on the other machine. origination was simple and fast, all I needed to do was connect the printer to the computer via USB and plug in the power lead. After turning on the printer I turned on the computer, then I installed the drivers and relevant software from the CD. After a quick reboot I printed a test page and it worked fine.Finding the network printer.To start the process I went to Start Control Panel Hardware and sullen Devices and Printers Add a printer.Decide what type of printer you are trying to find, because the printer i recollect to use runs through another computer i need to select Add a network, radio set or Bluetooth printer.Hit Next and allow it to search, once the results are displayed select the printer you wish to use.You should get a quick window showing you its being connected.You should get a window telling you everything was successful.Followed by the option to print a test page.File management.To demonstrate file management Im going to show a simple way to manage your files.Sometimes folders and files get in the harm place and things start to get addled and missing files get accidently removed.Make sure you delete idle and old files to let go of up hard disk topographic point, do this by selecti ng the document and hitting delete or right clicking the file and selecting delete.After creating relevant folders and deleting unnecessary files the folder looks much more nonionized and manageable.Disk CleanupDisk Cleanup is a maintenance utility bundled in with Microsoft Windows, its purpose is to free up disk space on the computers hard drive. Disk Cleanup first searches your hard drives for files that are no longer being used it then deletes these unnecessary files. As swell as tastefuling unused files Disk cleanup can also compress files that havent been used for a long period of time, this helps make space but if you wish to access files that have been compressed at a later data the loading times can be Disk Cleanup looks in various categories to target these files.* Downloaded Program files* Compression of old files* Temporary Internet files* reprocess Bin* Offline files* Removal of unused applications or optional Windows components* Setup Log files* Temporary Windows fi leThese arent the only locations Disk Cleanup looks for files, some options only appear with certain computer configurations. at that place are also options to remove unused windows components to help free disk space.Quick font of how it worksTo start Disk Cleanup go to Start Programs Accessories System ToolsWhen the program launches it will begin analyzing how much space it will be able to free.The next step is selecting what you wish to clean, be careful you dont delete things you need, saved passwords for internet website ect.The View Files button allows you to see the files that will be cleaned.After selecting what to clean you then run the programs, the progress bar shows you how long till its done.AntivirusEvery computer that connects to the internet demand an antivirus program, an antivirus program is used to detect, baffle and remove computer viruses, Trojans horses, worms and in some cases spyware, adware and other malicious software.There are various strategies for detecting threats the most common is signature-based detection, this involves using a library of already cognize threats and prying for these patterns in executable code. Unfortunately some threats are too new to be in this library in cases like this the antivirus attempts to compare code in its library with new threats.Quick ideal of how it worksThis depends on where you install your antivirus but they can be launched by going to Start Programs Antivirus manufactures name Antivirus program.For this example ill be using my colleges antivirus, Sophos.When you launch the antivirus it will have several options, the first thing you need to do is to update the program, and its no good searching for viruses if youre using and out of date database.After updating you need to scan for potential threats.The scan progress window will give you a rough idea of when it will finish as well as whats being scanned and what infections have been found.After the scan is completed you should get s ome form of summary, this will tell you the do of items scanned, infected items and items that have been place in quarantine.By quarantining threats it ensures your computer stays completely serious, some items are misread and are actually not harmful so quarantining these allows the user to tell the antivirus that they are safe before they get deleted.Available utility softwareUtility software allows a user to analyze, configure, perfect and maintain their computer and should ned be confused with application software, this type of software allows us to create text edition documents, listen to music, browse the internet and much more.UtilityDescriptionDisk DefragmentersLocates files that are broken over different locations then moves the fragments to the same location to increase efficiency.Disk CleanersThis disk utility is knowing to free up disk space and a computers hard drive. It does this by searching and analysing the hard drive for files that are no longer of any use, it then removes the unnecessary files.BackupThis involves devising copies of important data so that these additional copies can be used to restore the original if it were lost or damaged.CLI and GUICLI allows you to interact with a computer by typing commands in the text only interface. GUI is another way you can interact with a computer, instead of using a text interface it has a graphical interface that consists of icons.Registry CleanersThis utility was designed to remove registry entries that are no longer in use and are unwanted.AntivirusThat is used to prevent and remove malware, including Worms, Trojan horses and computer viruses.