A+ Guide to Managing and Maintaining Your PC Fifth Edition Chapter 12 Supporting Windows 9x

2 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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

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

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

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

6 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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

7 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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

8 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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

9 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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)

10 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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 )  Other window files (Table 12-5)

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

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

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

14 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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

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

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

17 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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

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

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

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

21 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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)

22 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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

23 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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) Trouble Shooting