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Chapter 12

Chapter 12. Supporting Windows 9x. A Compromise Between Windows and DOS. The core: a combination of 16-bit and 32-bit code Memory management DOS (base, upper, and extended memory) Windows (memory paging and virtual memory) Device drivers – 16-bit and 32-bit. Core OS Files.

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Chapter 12

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  1. Chapter 12 Supporting Windows 9x

  2. A Compromise Between Windows and DOS • The core: a combination of 16-bit and 32-bit code • Memory management • DOS (base, upper, and extended memory) • Windows (memory paging and virtual memory) • Device drivers – 16-bit and 32-bit A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  3. Core OS Files A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  4. Virtual Machines • Set of resources made available to an application through predefined application programming interface calls (APIs) • Multiple logical machines within one physical machine A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  5. Virtual Machines (continued) A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  6. Clean Installation • Ignores system settings, including information for hardware and software • Must reinstall all hardware and software • Data files can be retained • To do a clean installation • The hard drive does have to be formatted, but \Windows folder should be deleted A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  7. Upgrade Installation • Carries forward system settings and information in the current OS • Software and hardware do not need to be reinstalled • Problems in the current OS may be carried forward A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  8. Installation Process • Make sure to create the Startup disk • Setup options • Typical • Portable: when install Windows on a laptop • Compact: smallest possible installation • Custom: the users can select components • Setup log files • Setuplog.txt: records the progress of the installation • Detlog.txt: records the hardware detected A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  9. Hands-on Project: Install Windows 98 • Do a clean install of Windows 98 • Add additional system components (pp. 535) • Download service packs or patches (pp. 535) • Install a new hardware (pp. 539) • Install a new software (pp. 543) A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  10. Configuring the Boot Process • Most done through registry • Modify Msdos.sys (pp. 536 and Table 12-3) • Configure initialization files • Use sysedit to open initialization files (Figure 12-14) • Other window files (Table 12-5) A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  11. Windows .ini Files A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  12. Windows 9x Startup Process A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  13. Windows 9x Startup Process (continued) A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  14. The Windows 9x Registry • Database of configuration information and settings for users, hardware, applications, and the OS • Hierarchical database with a treelike, top-to-bottom design • Takes over essential functions of .ini files • Supports System.ini and Win.ini for backward compatibility A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  15. How the Registry Is Organized A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  16. How the Registry Is Organized (continued) A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  17. Recovering from a Corrupted Registry • Windows 95 backup of the registry • Maintains backup copy of the two registry files • Windows 98/Me Registry Checker (Figure 12-33) • Automatically backs up registry every day • Keeps last five days of backups A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  18. Recovering from a Corrupted Registry with Windows 98/Me A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  19. Hands-on Project: System Monitor • pp. 571 & Figure 12-18 A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  20. Hands-on Project: System Configuration Utility • pp. 572 & Figure 12-19 A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  21. Windows Utilities • System Configuration Utility (Msconfig.exe) (pp. 572) • System File Checker (pp. 568) • Automatic Skip Driver Agent (ADDA) (pp 576) • Dr. Watson (pp. 573) A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  22. Windows 9x Startup Menu Options • Normal • Logged (\Bootlog.txt) • Safe Mode • Safe Mode with Network support • Step-by-step confirmation • Command prompt only • Safe Mode command prompt only • Previous version of MS-DOS A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  23. Trouble Shooting • If Normal mode has problems, but safe mode does not, check • Config.sys and autoexec.bat (step & step confirmation) • System.ini and win.ini (pp. 583) A+ Guide to Managing and Maintaining Your PC, Fifth Edition

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