Question

describe briefly the functions of various Windows accessories

Answer 1

The Magnifier

In all windows OS's

The Magnifier is a display utility that makes the computer screen more readable by people who have low vision by creating a separate window that displays a magnified portion of the screen. Magnifier provides a minimum level of functionality for people who have slight visual impairments.

The Narrator

From Windows 2000 and newer

The Narrator is a text-to-speech utility for people who are blind or have low vision. Narrator reads what is displayed on the screen—the contents of the active window, menu options, or text that has been typed.

The On-screen Keyboard



On–Screen Keyboard is a utility that displays a virtual keyboard on the computer screen. This tool allows people with mobility impairments to type data by using a pointing device or joystick. Besides providing a minimum level of functionality for some people with mobility impairments, On–Screen Keyboard can also be helpful for people who do not know how to type.
You find the tools by clicking System Toolsfrom the Accessories menu

The most important accessories to know are:

Back UpDisk CleanupDisk Defragmenter

Backup!
Where I come from, we have a saying "Real men do not back up!". The very same "real men" always come to me for help, when they run into trouble from NOT having backed up anything and their hard drive crashes. Unfortunately there is nothing I can do to help them - other than point out to them that in MY opinion "real men" are smart men, who DO back up important files on a weekly or monthly basis, - time frame depending on how much they use their computers and how important to them their work is.
The Disk Defragmenter

When you click the Disk Defragmenterfrom the Windows accessories > System Tools menu



you will see this window.

The Disk Fragmenter sorts out the files on your drive(s) to optimize the space you are using. Defragmenting you drive(s) perodically is a good tool for optimizing your computers performance.

If you click the Analyze button first, the defragmenter will analyze the specific drive selected in the window and tell you, whether or not it is time to go through the defragmentation process.