A guide to software 4e
Download
1 / 31

A+ Guide to Software, 4e - PowerPoint PPT Presentation


  • 113 Views
  • Uploaded on

A+ Guide to Software, 4e. Chapter 7 Supporting Windows 9x/Me. Windows 9x/Me Architecture. Encompasses a number of releases: Windows 95, Windows 98, Windows Me Two components of the OS: shell and kernel Shell Relates to the user and applications User component: manages I/O

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'A+ Guide to Software, 4e' - miyo


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
A guide to software 4e l.jpg

A+ Guide to Software, 4e

Chapter 7

Supporting Windows 9x/Me


Windows 9x me architecture l.jpg
Windows 9x/Me Architecture

  • Encompasses a number of releases:

    • Windows 95, Windows 98, Windows Me

  • Two components of the OS: shell and kernel

  • Shell

    • Relates to the user and applications

    • User component: manages I/O

    • Graphic Devices Interface (GDI): supports graphics

  • Kernel

    • Interacts with the hardware

    • Fulfills requests for service passed from the shell

A+ Guide to Software, 4e


Virtual machines l.jpg
Virtual Machines

  • Application programming interface (API) call

    • Used by application to access hardware or software

  • Virtual machine (VM)

    • Set of resources made available through APIs

    • Analogy: virtual machines are like logical drives

  • Virtual machines allocated by OS based on need

    • DOS program: provided with its own VM

    • Windows 16-bit application: shares VM and addresses

    • Windows 32-bit application: shares VM only

  • General Protection Fault: caused by 16-bit programs

A+ Guide to Software, 4e


Virtual memory l.jpg
Virtual Memory

  • Virtual memory: hard drive space acting like memory

  • Functions of Virtual Machine Manager (VMM)

    • Stores virtual memory in a file called a swap file

    • Moves 4KB pages into and out of physical RAM

  • Disk thrashing: caused by excess memory paging

  • Settings you can change in Virtual Memory dialog box

    • Minimum and maximum file size

    • The location of the swap file (Win386.swp)

  • Swap files can be placed on a compressed drive

A+ Guide to Software, 4e


Slide5 l.jpg

Table 7-2 Minimum and recommended hardware requirements for Windows 9x/Me

A+ Guide to Software, 4e


Installing windows 9x me continued l.jpg
Installing Windows 9x/Me (continued)

  • Choosing a file system

    • FAT16: 16-bit cluster entries allowing 65,535 clusters

    • FAT32: 28-bit cluster entries allowing more clusters

    • FAT32 drives are less likely to have slack

  • Installing a Windows 9x/Me as a clean installation

    • Prepare your system first; e.g., verify boot sequence

    • Install Windows 98/Me from a bootable setup CD

    • If PC does not boot from CD, boot from a floppy disk

      • Then insert the CD and enter D:\Setup.exe

    • When dialog box opens, follow onscreen instructions

A+ Guide to Software, 4e


Installing windows 9x me continued7 l.jpg
Installing Windows 9x/Me (continued)

  • Installing Windows 9x/Me as an upgrade

    • Prepare for installation; e.g., create a rescue disk

    • Start the PC, loading the current operating system

    • Close all open applications

    • Insert CD in CD-ROM drive or floppy disk in floppy drive

    • Enter the command D:\Setup.exe in Run Dialog box

    • Follow the instructions on the setup screen

  • Installation process from the setup screen forward

    • Four options: Typical, Portable, Compact, Customer

    • Installation logs: Setuplog.txt, Detlog.txt, Detcrash.log

A+ Guide to Software, 4e


Installing windows 9x me continued8 l.jpg
Installing Windows 9x/Me (continued)

  • Downloading/installing updates for Windows 9x/Me

    • Updates include service packs or patches

    • Microsoft is no longer updating Windows 9x/Me

    • Find previous updates at windowsupdate.microsoft.com

      • Use Windows Update on Start menu to access page

  • Configuring Windows 9x/Me Startup with Msdos.sys

    • Msdos.sys is a hidden, read-only system file

    • Msdos.sys has parameters affecting how the OS boots

    • You must change Msdos.sys file attributes before use

    • Table 7-3 (partially reproduced): details file contents

A+ Guide to Software, 4e


Installing and managing hardware with windows 9x me l.jpg
Installing and Managing Hardware with Windows 9x/Me

  • Driver: interfaces application and OS with a device

  • Ways to begin device driver installation process

    • Install device, power on PC, launch install wizard

    • Run installation program on setup disk or CD

    • Download driver from Internet, run setup file

  • Scenario: view and change current video driver

    • Open the Control Panel and double-click Display

    • Go to Settings tab to view the installed display driver

    • To change driver, go to AvancedAdapterChange

A+ Guide to Software, 4e


Installing and managing hardware with windows 9x me continued l.jpg
Installing and Managing Hardware with Windows 9x/Me (continued)

  • Plug and Play (PnP)

    • Specifications simplifying the installation of hardware

  • Criteria for use of PnP

    • The system BIOS must be PnP

    • All devices and expansion cards must be PnP-compliant

    • The OS must support PnP

    • A 32-bit device driver must be available

  • DriveSpace utility

    • Used to compress FAT16 volumes in Windows 9x

A+ Guide to Software, 4e


Slide11 l.jpg

Figure 7-20 (continued)ScanDisk results

A+ Guide to Software, 4e


Installing and managing software in windows 9x me l.jpg
Installing and Managing Software in Windows 9x/Me (continued)

  • Preparing for the software installation

    • Check available resources

    • Protect the original software

    • Back up the registry and system configuration files

  • Installing software

    • Open Control Panel

    • Double-click Add/Remove Programs

    • Insert software CD or disk in appropriate drive

      • Alternatively, download software file from the Internet

    • Follow directions on setup screen

A+ Guide to Software, 4e


Installing and managing software in windows 9x me continued l.jpg
Installing and Managing Software in Windows 9x/Me (continued)

  • Troubleshooting software installations

    • Delete all files and folders under \Windows\Temp

    • Look for guidance in Readme.htm hypertext file

  • Supporting DOS applications under Windows 9x/Me

    • Access the Properties feature of DOS program file

    • Select Program tab and then click Advanced tab

      • Example: select Specify a new MS-DOS configuration

    • Changes are stored in program’s information file (PIF)

A+ Guide to Software, 4e


Files used to customize the startup process l.jpg
Files Used to Customize the Startup Process (continued)

  • Autoexec.bat and Config.sys

    • Contain settings for loading 16-bit drivers and TSRs

    • Supported for backwards compatibility with DOS

  • Initialization files (those with .ini extension)

    • Custom settings used to load Windows 3.x programs

    • Supported for backwards compatibility with Windows 3.x

  • You can edit text files with various tools; e.g., Sysedit

  • Comment line: information ignored by application

A+ Guide to Software, 4e


Slide15 l.jpg

Figure 7-22 (continued)Sysedit can be used to edit Windows system files

A+ Guide to Software, 4e


Slide16 l.jpg

Table 7-4 (continued)Windows .ini files

A+ Guide to Software, 4e


Slide17 l.jpg

Figure 7-24 (continued)Windows 9x/Me core components and the loading process

A+ Guide to Software, 4e


System monitor l.jpg
System Monitor (continued)

  • Monitors how system resources are being used

  • Items monitored

    • The file system

    • Memory

    • The kernel

    • Printer sharing services

    • Network performance data

A+ Guide to Software, 4e


System configuration utility msconfig l.jpg
System Configuration Utility (Msconfig) (continued)

  • Used to reduce startup to core components

    • Similar to Safe Mode

  • How to access the System Configuration Utility

    • Enter Msconfig in the Run Dialog Box

  • How to isolate a problem using Msconfig

    • Select Diagnostic startup, click OK and restart PC

    • Next, select Selective startup from the dialog box

    • Methodically add items until the problem reappears

    • Source of problem is related to the last added item

  • A few alternatives: Registry Checker, CMOS setup

A+ Guide to Software, 4e


Dr watson l.jpg
Dr. Watson (continued)

  • Used to troubleshoot problems running a program

  • Information logged by Dr. Watson

    • Detailed system information

    • Errors

    • Programs that caused errors

  • Using Dr. Watson

    • Start the utility

    • Reproduce the application error

    • Go to Diagnosis tab to view events

    • Cross-check information to support.microsoft.com

A+ Guide to Software, 4e


The windows 9x me registry and registry checker l.jpg
The Windows 9x/Me Registry and Registry Checker (continued)

  • Registry

    • Database of configuration information and settings

    • Takes over the essential functions of .ini files

    • 16-bit applications cannot access the Registry

  • Organization of the Registry

    • Hierarchical database appearing as an inverted tree

    • Six major keys appearing in the left pane

    • Values and value data appear in the right pane

  • System.dat and User.dat

    • Files used to store the Windows 95/98 registry

A+ Guide to Software, 4e


Slide22 l.jpg

Table 7-7 (continued)Six major branches, or keys, of the Windows 9x/Me registry

A+ Guide to Software, 4e


The windows 9x me registry and registry checker continued l.jpg
The Windows 9x/Me Registry and Registry Checker (continued) (continued)

  • Ways to recover registry data in Windows 95

    • OS replaces System.dat with backup System.da0

    • OS enters Safe Mode and prompts recovery process

    • If backups are missing, restore registry from setup disk

  • Ways to recover registry data in Windows 9x/Me

    • Recover using backups made by Registry Checker

    • Registry Checker types: Scanreg.exe, Scanregw.exe

  • Modifying the registry

    • Automatically performed in most cases

    • Manually edit the registry using Regedit.exe

A+ Guide to Software, 4e


Troubleshooting windows 9x me l.jpg
Troubleshooting Windows 9x/Me (continued)

  • Problems are categorized by phase of OS operation

    • Windows installation

    • Startup process

    • Normal Windows operations

  • Troubleshooting techniques are tailored to problem

A+ Guide to Software, 4e


Slide25 l.jpg

Table 7-9 (continued)Some problems and solutions when installing Windows 9x/Me

A+ Guide to Software, 4e


Slide26 l.jpg

Table 7-9 (continued)Some problems and solutions when installing Windows 9x/Me (continued)

A+ Guide to Software, 4e


Troubleshooting windows 9x me startup continued l.jpg
Troubleshooting Windows 9x/Me Startup (continued) (continued)

  • Press F8 during startup to open startup menu

  • Windows 9x/Me startup menu options

    • 1. Normal

    • 2. Logged (\BOOTLOG.TXT)

    • 3. Safe Mode

    • 4. Safe Mode with network support

    • 5. Step-by-step confirmation

    • 6. Command prompt only (not in Windows Me)

    • 7. Safe Mode command prompt only (not in Win Me)

    • 8. Previous version of MS-DOS

A+ Guide to Software, 4e


Troubleshooting windows 9x me startup continued28 l.jpg
Troubleshooting Windows 9x/Me Startup (continued) (continued)

  • A few tips for troubleshooting with the startup menu

    • Try a hard boot

    • If you have not already done so, try Safe Mode next

    • Look for errors using Step-by-Step confirmation

    • Use Logged option and examine Bootlog.txt

  • Using the startup disk for troubleshooting

    • If the emergency disk is not available, make one

    • Check disk for viruses before inserting it into PC

    • Disk should have drivers needed to access CD drive

A+ Guide to Software, 4e


Troubleshooting problems after windows 9x me startup l.jpg
Troubleshooting Problems After Windows 9x/Me Startup (continued)

  • A few questions to ask the user

    • When did the problem start?

    • Did you move your computer system recently?

    • Has someone else been using your computer recently?

  • Some general tips for troubleshooting hardware

    • Try rebooting the computer

    • Test the device with another application

    • Check Device Manager for errors reported on device

    • The driver might be corrupted or need updating

    • Try reseating an expansion card

A+ Guide to Software, 4e


Troubleshooting problems after windows 9x me startup continued l.jpg
Troubleshooting Problems After Windows 9x/Me Startup (continued)

  • Some tips for troubleshooting application problems

    • Address error messages appearing during program use

    • Try uninstalling and reinstalling the software

  • Some tips for troubleshooting a shortcut icon

    • Decide if the icon on the desktop is actually a shortcut

    • Check name and location of target file for the shortcut

  • Some tips for troubleshooting a slow system

    • Check for applications unnecessarily loaded at startup

    • Verify Windows is using optimum caching on hard drive

A+ Guide to Software, 4e


Slide31 l.jpg

Figure 7-37 (continued)Troubleshooter making a suggestion to resolve a hardware conflict

A+ Guide to Software, 4e