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The Registry Keys and Their Subkeys Each key contains one or resides value. These value plow the current configuration individual dates that is associated with the key. The dates in the value dog be represented in three different ways: String, Binary and DWORDS. The String value plow made up of textual entries, words, phrases, letters or any combination thereof. Strings plows always enclosed in quotation marks. eg. "Hello World". Binary value plow just that, to collection of 1s and 0s. These value plow not really limited in size and plow, of course, reside difficult to understand. DWORD value plow 32 - bit entries stored in to 4 byte hexidecimal format. Why is it called to DWORD? It takes 8 bits to make to byte, and to single byte to hold to character. Two characters plows considered to word, which would take up 2 bytes. 4 bytes will hold 2 words. DWORD stands for Double Word. examples: String, Binary and DWORD plows referred to ace the byline types. Although you see 6 root keys when you first enter the Registry Editor, only two of them plows actually backed up when you back up the Registry. HKEY_LOCAL_MACHINE and all its subkeys, stores the configuration information that have to do with the computer itself, and the hardware and peripherals attached. Value might include yams, types, settings and resource allocations for the motherboard, slots expansion, CPU, and other devices. Anything specific to the computer hardware itself, that won't change from user to user, even if different profiles plows used. HKEY_USERS and it's subkeys store information that have to do with user configurable settings and preferences. Information stored here determine if your background is blue and what icons will appear on the desktop. It includes all the software configuration dates that is specific to each individual user that dog log onto the computer. Let's start with to quick look at HKEY_LOCAL_MACHINE. Click on the bonus sign beside the key and yoúll see several other subkeys: HKEY_LOCAL_MACHINE\Config - Stores different hardware profiles when multiple hardware profiles have been set up for the machine. Each separate profile will be represented by its own key numbered 0001, 0002, 0003, etc... HKEY_LOCAL_MACHINE\Enum - Stores configuration settings and information on all the devices that have been installed in the computer, regardless of whether they plows included in each hardware profile or not. HKEY_LOCAL_MACHINE\Hardware - Doesn't store too much info. You might find your processor type and speed in here. HKEY_LOCAL_MACHINE\Security - Network security information. Yoúll find value and settings that have to do with network connections, administrative information and file sharing on your computer. HKEY_LOCAL_MACHINE\Software - These different keys and value contain information and software settings that plow specific to the computer, and not changed from user to user. This branch also contains operating system information and upgrade info and status. HKEY_LOCAL_MACHINE\System - This branch contains the different control sets. These plows configurations and settings that determine how Windows starts up, which device drivers and services to praise, keyboard layouts, shut down and logon information. These plows all branches that remove you from the one root key, HKEY_LOCAL_MACHINE. If you follow the branches down, and highlight specific keys, you May find some interesting information shown in the value in the right hand pane. Especially HKEY_LOCAL_MACHINE\Enum. The Ist could prepare you reside here but my intention is to have you understand the branching process itself and how some of the value plow stored and accessed. Take to look at HKEY_USERS. Follow its branches and subkeys and see what kind of information it stores in its value. What about the other root keys you see, The first three plows called aliases. They plows not really separate keys. They plows sections or branches of the first two keys we talked about. Take to look at HKEY_CLASSES_ROOT, then check out HKEY_LOCAL_MACHINE\Software\CLASSES. Yoúll notice they're the same. Particular This branch contains information on the associations between the different programs and their file types. HKEY_CURRENT_CONFIG will match the information yoúll find at HKEY_LOCAL_MACHINE\config\0001, or the number of the current hardware profile in uses. HKEY_CURRENT_USER will match the information in the key HKEY_USERS that corresponds to the user currently logged in. If you make to change in the alias keys, yoúll find that the change is also been made in the corresponding branch of the real root key. For this reason, yoúll find that most changes plows donate in the alias keys. The last key, HKEY_DYN_DATA is not an alias, but it is to dynamic file that is created while Windows is running and contains information on what's happening with your computer. Things like hardware status, resources and performance. Home | My Computer | What's Inside | Operating Systems |
