Windows: Registry Tutorial
The registry is a database that stores lots software configuration data, many are used by Microsoft Windows operating system itself.
WARNING: some mistakes in editing registry can make part of your Windows not work properly. Be careful.
Launching Registry Editor
To look at registry, launch the Registry Editor. Type ❖ Window+r to launch the run dialog, then type “regedit”.
Before you do anything, do a backup.
In Registry Editor, use the menu [File ▸ Export] to make a backup.
Save the backup as
As of 2021-06-08, on my machine, it takes 20 seconds and
the saved file size is 380 megabytes.
Registry data are key and value pairs. The “key” is like folders. Key can contain other keys.
At the root level, there are the following keys.
Each of the above is called a “hive”.
A “value” has several possible types. Here is a list of possible types:
|REG_EXPAND_SZ||expandable string. Values between % char are expanded as environment variables|
|REG_DWORD/REG_DWORD_LITTLE_ENDIAN||A integer, ranging from 0 to 2^32-1, with byte order being little-endian.|
|REG_DWORD_BIG_ENDIAN||A integer, ranging from 0 to 2^32-1, with byte order being big-endian|
|REG_LINK||symbolic link (char set in UNICODE)|
|REG_MULTI_SZ||A is a array of strings|
|REG_RESOURCE_REQUIREMENTS_LIST||Resource Requirements List|
|REG_QWORD/REG_QWORD_LITTLE_ENDIAN||A QWORD value, a 64-bit integer (either big- or little-endian, or unspecified) (Introduced in Windows 2000)|
Using PowerShell to View/Edit Registry
PowerShell: Windows Registry