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Understanding The Registry

Put simply, the Windows registry
is a central repository of information
about all aspects of the
computer – in particular, its hardware,
operating system, applications and users.
It can be accessed and updated
under software control and also directly
by users.
The registry first appeared in Windows
3.1. In that system it was a single
file, called REG.DAT, and was mainly
used to store information about OLE
objects. Most other configuration data
was held in various INI files, of which
WIN.INI and SYSTEM.INI were the
most important.
The modern registry, as found in
Windows 9x and NT, brings together
all the information thatwas previously
held in REG.DAT and the separate INI
files.

Windows XP Registry Tweaks

Structure of Windows XP Registry :
When you will open the Windows XP Registry , you will see it’s divided into two
panes. On the left side there are Five main
Keys as shown below. These can be expanded to several Sub-Keys, which further has
many Sub-Keys.
+HKEY_CLASSES_ROOT
+HKEY_CURRENT_USER
+HKEY_LOCAL_MACHINE
+HKEY_USERS
+HKEY_CURRENT_CONFIG

download AWindows XP Registry Tweaks .pdf