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Narcisse95
2011-10-24, 13:03
The computer:
A computer is a programmable (http://en.wikipedia.org/wiki/Computer_program) machine (http://en.wikipedia.org/wiki/Machine) designed to sequentially and automatically carry out a sequence of arithmetic or logical operations. The particular sequence of operations can be changed readily, allowing the computer to solve more than one kind of problem. An important class of computer operations on some computing platforms is the accepting of input from human operators and the output of results formatted for human consumption. The interface between the computer and the human operator is known as the user interface (http://en.wikipedia.org/wiki/User_interface).
Computer Components:
Computers are made of the following basic components:
Case with hardware inside:
Power Supply - The power supply comes with the case, but this component is mentioned separately since there are various types of power supplies. The one you should get depends on the requirements of your system. This will be discussed in more detail later
Motherboard - This is where the core components of your computer reside which are listed below. Also the support cards for video, sound, networking and more are mounted into this board.
Microprocessor - This is the brain of your computer. It performs commands and instructions and controls the operation of the computer.
Memory - The RAM in your system is mounted on the motherboard. This is memory that must be powered on to retain its *******s.
Drive controllers - The drive controllers control the interface of your system to your hard drives. The controllers let your hard drives work by controlling their operation. On most systems, they are included on the motherboard, however you may add additional controllers for faster or other types of drives.
Hard disk drive(s) - This is where your files are permanently stored on your computer. Also, normally, your operating system is installed here.
CD-ROM drive(s) - This is normally a read only drive where files are permanently stored. There are now read/write CD-ROM drives that use special software to allow users to read from and write to these drives.
Floppy drive(s) - A floppy is a small disk storage device that today typically has about 1.4 Megabytes of memory capacity.
Other possible file storage devices include DVD devices, Tape backup devices, and some others.
Monitor - This device which operates like a TV set lets the user see how the computer is responding to their commands.
Keyboard - This is where the user enters text commands into the computer.
Mouse - A point and click interface for entering commands which works well in graphical environments.
These various parts will be discussed in the following sections.
What should I do if my computer has a virus?
Note: For a list of resources to help you find information about particular viruses, see the "More information" section of What are viruses, worms, and Trojan horses? (http://kb.iu.edu/data/aehm.html)
Don't panic if your computer seems to have a virus. Common software problems, such as program execution errors and corrupted files, can create symptoms that appear to be virus-related; it is important to distinguish between virus symptoms and those that come from corrupted system files. Try to rule out more standard causes before suspecting a virus. For example, if you just installed new software, try uninstalling it and see if the problems disappear.
However, if your computer begins to act strangely or is unable to do things it has always done in the past, it may be infected with a virus. Symptoms such as longer-than-normal program load times, unpredictable program behavior, inexplicable changes in file sizes, inability to boot, strange graphics appearing on your screen, or unusual sounds may indicate a virus on your system.
If you cannot boot your computer, contact your campus Support Center (http://kb.iu.edu/data/abxl.html).
Note: The University Information Security Office (UISO) recommends that you run the latest version of Symantec virus protection software (available to IU students, faculty, and staff free of charge via IUware) for your operating system. Be sure to upgrade safely, update your virus definitions daily, and scan your computer weekly. See In Windows, how do I safely upgrade to the latest Symantec Endpoint or AntiVirus software? (http://kb.iu.edu/data/aqgp.html)
See:
Windows: In Symantec/Norton AntiVirus for Windows, how do I schedule automatic LiveUpdates and virus scans? (http://kb.iu.edu/data/agzb.html)
Mac OS and OS X: In Symantec Endpoint Protection for Mac OS X, how do I schedule automatic LiveUpdates and virus scans? (http://kb.iu.edu/data/agzc.html)
If your antivirus software finds a virus, it will give you the option to repair, delete, or quarantine the infected file. The quarantine option simply copies the infected file to an isolated directory (called the quarantine folder) on your hard drive, which protects it from access by users or other files. If your antivirus software can't repair the file (e.g., if the damage is too extensive or is the result of an unknown virus), it copies the file into the quarantine folder and deletes it from the drive.
If you have had infected files, once your virus software has cleaned them, you may need to do additional work to repair them. The easiest solution is to open the cleaned file, select all the information in the document, and copy and paste it into a new document. Files that have been cleaned often seem to have some file corruption remaining even though the virus and the macros have been removed. If garbage or unwanted words have been introduced into your files, you may be able to use the search and replace function of your word processing or spreadsheet application to eliminate them.
If the infected file was a Microsoft Word file, as a final step you can delete the normal.dot file (called the normal file on a Mac). This file's ******** varies depending on how Word was installed, so the best way to find it is to use the Start menu's Find option (in Windows), or, with the Finder active on a Mac, from the File menu, select Find... (look for the Normal.dotm document in your home folder Library; open Application Support, then Microsoft, then Office, and finally User Templates). The next time you open Word, it will automatically recreate a correct version of this file.
http://www.eastcoast.co.za/faq/newuser.htm
مشكورة اخت Narcisse95 على هذا المجهود
;والله انا ثاني نحتاج البحث هدا شكرا لك يا اخي على وضع الموضوع وشكرا للاخت على المعلومات القيمة
princesse mimi
2011-11-27, 20:21
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princesse mimi
2011-11-27, 20:22
mOn frére tùù vàS trouver tOus sà sùùr
anCle Google :)