TABLE 1: Registry Value Types

  Value Type                     Description

  REG_NONE                       No value type

  REG_SZ                         Unicode NULL terminated string

  REG_EXPAND_SZ                  Unicode NULL terminated string that can have
                                 embedded environment variables

  REG_BINARY                     Arbitrary length binary data

  REG_DWORD                      32-bit number

  REG_DWORD_BIG_ENDIAN           32-bit number, high byte first

  REG_LINK                       Unicode symbolic link

  REG_MULTI_SZ                   Array of Unicode strings

  REG_RESOURCE_LIST              Hardware resource description

  REG_FULL_RESOURCE_DESCRIPTOR   Hardware resource description

  REG_RESOURCE_REQUIREMENTS_LIST Resource requirements

































 TABLE 2: Registry Root Keys
 Root Key           Description                Link

 HKEY_CURRENT_USER  Information related to     Subkey under HKEY_USERS corresponding to
                    currently logged-on user   currently logged-on user

 HKEY_USERS         Contains subkeys for all   Not a link
                    local user accounts
                    Contains file association
 HKEY_CLASSES_ROOT  and OLE registration       HKEY_LOCAL_MACHINE\ SOFTWARE\Classes
                    information
                    All static and dynamic
 HKEY_LOCAL_MACHINE system configuration       Not a link
                    information
 HKEY_DYN_DATA      Performance counters       Not a link
                                               HKEY_LOCAL_MACHINE\
 HKEY_CURRENT_CONFIGInformation about          SYSTEM\CurrentControlSet\ Hardware
                    hardware configuration
                                               Profiles\Current

































 TABLE 3: Registry Root Key Abbreviations

 Root Key                 Abbreviation

 HKEY_CURRENT_USER        HKCU

 HKEY_USERS               HKU

 HKEY_CLASSES_ROOT        HKCR

 HKEY_LOCAL_MACHINE       HKLM

 HKEY_DYN_DATA            HKDD

 HKEY_CURRENT_CONFIG      HKCC

































 TABLE 4: HKEY_CURRENT_USER Subkeys

 Subkey                    Description

 AppEvents                 Sound/event associations

 Console                   Command window shortcut settings (e.g., width,
                           height, colors)

 Control Panel             Screen saver, desktop scheme, keyboard, and
                           mouse settings

 Environment               Environment variable definitions

 Keyboard Layout           Keyboard layout setting (e.g., US, UK)

 Network                   Network drive mappings and settings

 Printers                  Printer connection settings

 Software                  User-specific software preferences

 UNICODE Program Groups    User-specific start menu group definitions

 Windows 3.1 Migration     File status data for systems that upgrade from
 Status                    Windows 3.x to NT 4.0

































 TABLE 5:

 HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet Subkeys

 Subkey            Description

 Control           Static NT tuning and configuration parameters

 Enum              Information collected when drivers and services are
                   started

 Hardware Profiles Video-related configuration information

 Services          Startup and error control for device drivers and
                   services

































 TABLE 6: Services Values and Subkeys

 Value                    Description

 DisplayName              Name shown in Control Panel's Services or Devices
                          applets

 ImagePath                Pathname of service or driver file if it's not in
                          SystemRoot\System32\Drivers

 ErrorControl             Indicates action NT will take if service or
                          device reports an error when it starts

                          0=Boot Start (core drivers)
                          1=System Start (at blue screen)
 Start                    2=Auto Start (after Win32 starts­approximately
                          when logon prompt appears)
                          3=Demand Start
                          4=Disabled

 Type                     Kernel-mode driver, File System, Win32 Service,
                          etc.

 Group, Tag               Controls load ordering for Boot Start and System
                          Start drivers

 DependOnService,
 DependOnGroup            Controls load ordering for Auto Start Drivers

 Parameters               Stores driver/service-dependent private settings

































 TABLE 7: Tuning a Workstation

 Target Tuning Option                          LargeSystemCache  Size

 Minimize Memory Used                          0                 1

 Balance                                       0                 2

 Maximize Throughput for File Sharing          1                 3

 Maximize Throughput for Network Applications  0                 3