Windows File System architecture

├-windows
│├-system32 (Storage System files and hardware drivers for Windows)
││├-config (User configuration information and password information)
│││└-systemprofile (System configuration information for recovering the system)
││├-drivers (for storing hardware driver files, not recommended for deletion)
││├-spool (used to store system print files.) including print color, print pre-save, etc.)
││├-wbem (a WMI test program that is used to view and change public information model classes, instances, methods, and so on.) Do not delete)
││├-ime (used to store the system input file, similar to the IME folder under Windows)
││├-catroot (computer startup test information directory, including hard software information detected at computer startup)
││├-com (used to store component service files)
││├-reinstallbackups (driver backup of hardware in PC)
││├-dllcache (used to store system cache files.) When the system files are replaced, the file Protection mechanism will copy the files under this folder to overwrite the non-system files .
││├-grouppolicy (Group Policy folder)
││
│├-system (System folder for storing system virtual device files)
│├-$NtUninstall $ (each patch to the system will automatically create such a directory, can be deleted)
│├-security (System security folder, used to store important data files of the system)
│├-srchasst (Search Assistant folder for System Search Assistant files, similar to the MSAgent folder)
│├-repair (System repair folder, which is used to store the configuration files needed to repair the system)
│├-downloaded Program Files (download Programs folder, used to store extensions IE functions of ActiveX and other plug-ins)
│├-inf (used to store INF files.) INF files are most commonly used to provide driver services for hardware devices, and it is not recommended to delete them.
│├-help (Windows Help file)
│├-config (System configuration folder, files used to store some temporary configuration of the system)
│├-msagent (Microsoft Assistant folder, store dynamic cartoon image, help you to better use the system.) Joche not necessary, can be deleted directly)
│├-cursors (mouse pointer folder)
│├-media (audio folder, switch and other WAV files stored here)
│├-mui (Multi-Language Pack folder, used to store multiple language files.) This folder is empty by default in Simplified Chinese system, but it is not recommended to delete this folder.
│├-java (Stores the Java running components and their program files. Deletion of files is not recommended)
│├-web
││├-wall***** (folder where desktop wallpapers are stored)
││
│├-addins (System attached folder, file for system additional functions)
│├-connection Wizard (Connection Wizards folder, which holds the relevant files for the Internet Connection Wizard)
│├-driver Cache (drive cache folder, which is used to store driver files for system-known hardware)
││└-i386 (Windows operating system comes with a known hardware driver file that can be deleted to save space)
│├-temp (System Temp folder, where content can be deleted all)
│├-twain_32 (scanner related)
│├-apppatch (Application patching backup folder, used to store patch files for the application)
│├-debug (System Debug folder, which is used to store the log files of the Debug module during system running)
│├-resources (System Resource folder, which is used to store the system Shell resource file, is the theme we see on the desktop)
││└-themes (desktop theme is stored here, can delete useless theme)
│├-winsxs (Store individual versions of Windows XP components, reducing configuration problems due to DLL files)
│├-ime (Input method information)
│├-pchealth (for files that coordinate, configure, and manage your computer's normal operation)
││└-helpctr (Help and Support)
││├-binaries (The msconfig we used to be here yo)
│├-offline Web Pages (offline Browse files stored here)
│├-prefetch (pre-read folder, which is used to hold pre-read information about files that have been accessed by the system (this information is the new information that is automatically generated when the system is accessed), to speed up the file access, with the extension "PF". The files in this folder can be deleted)
│├-shellnew
│├-fonts (font folder. To install a font, simply copy the font file to the directory .
│├-PSS (used to back up the system boot profile, typically backs up the "boot. ini", "System.ini", and "Win.ini" three files, with the extension "backup".) If the original three files of the system are corrupted, you can restore them from here. Delete is not recommended)
│├-registration (Register folder, which is used to store related files for system COM + or other component registration.) Not recommended to delete files here)
│└-downloaded Installations (store some installers using Windows Installer technology, mainly used to repair the program, etc.)
├-documents and Settings
│├-default User
││├-application data (Common Application Files folder. Private data for some of the applications that have been installed here)
││├-Desktop
││├-favorites (Favorites)
││├-nethood (network shared directory)
││├-my Documents (my document)
││├-printhood (print shared directory)
││├-recent (recently opened document)
││├-sendto (the right mouse button is sent to)
││├-"Start Menu
││├-templates (template folder, may have template files for Word, Excel, etc.)
││└-local Settings
││├-application Data
││└-temp (temporary file directory.) This is where temporary files that are generated during system and software operations are stored. Need to be cleaned regularly)
││└-temporary Internet Files (Temporary Internet folder. Need to be cleaned regularly)
│├-all Users (all user folders, where the changes are valid for all users)
│└-administrator (folder for system Administrator account)
├-program Files
│├-common files (shared application files are stored here)
│├-internet explorer (ie browser)
│├-complus Applications (configuration and tracing of COM + components, generally null)
│├-windows Media Player
│├-windowsupdate (for Windows upgrade, can be deleted)
│├-installshield Installation Information
│├-uninstall information (storage of software anti-installation information, after deletion may cause some software can not uninstall)
├-wmpub (Directory of Windows Media Service)
├-boot (folder for software such as one-click Restore)
├-inetpub (IIS folder)
├-downloads (flashget default download folder)
├-system Volume Information (System Restore folder)
└-tddownload (Thunderbolt default download folder)

Debug Folder
This is the System debug folder, which is used to store the log files of the debug module during the system running, so that the administrator can discover the problems of the computer based on these log files. Where the "UserMode" folder is stored in the current user's debug log file.

IME Folder

This is the Input Method folder, used to store the system default installation of input method files. Windows operating system has embedded in the East Asian countries of the input method, such as Japanese, Korean, can theoretically be used to remove some other language input method, but it is not recommended, because this may lead to the input method system instability, seriously affect the normal use of Simplified Chinese input method.
chsime: Simplified Chinese input method;
chtime: Traditional Chinese input method;
IMEJP: Japanese Input method;
IMEJP98: Japanese 98 input method;
imjp8_1: Microsoft IME Standard 2002 of the 8.1 version of the input method;
Imkr6_1: Korean language (IME2002) 6.1 version input method;
SHARE: East Asian shared folder.

Fonts Folder

This is the font folder that is used to store the font files that the system will use. The user's own newly installed fonts will also be stored in this folder. There are more font types in English, while Simplified Chinese font files include only Fangsong, boldface, italics, Arial and the new Arial four types, that is, the GB2312 in the computer code. You can delete some of these infrequently used English fonts.

Installer Folder

this is used to store MSI files or temporary files required for program installation. MSI file is a Windows System installation package, right-clicking the file in the right-click menu allows you to choose to install or uninstall the program. Some programs must use the MSI file when uninstalling, so it is not recommended to delete files within this folder.

System32 folder

This is a 32-bit system folder to hold important files of the system, while some applications will be installed to copy their corresponding supporting files to this folder, it is strongly against the deletion of this folder file or the practice of this folder. Since there are many files in this folder and this folder, we only list some representative folders

①catroot: A directory used to store computer startup test information, including hard software information detected at startup.
②com: Used to store the component service file and the "Comexp.msc" running it will open the Component Services console.
③dllcache: Used to store the system cache file, when the system's original file is replaced, the File Protection mechanism will copy the file

to overwrite non-system files by clamping the backup system files. You can scan the system files using the "sfc/scannow" command format, and then you can delete all the files under it.
④drivers: Used to store hardware driver files. If you delete the file, it will cause the hardware to lose its driver and not be valid.
⑤ime: Used to store the system input file, similar to the IME folder.
⑥oobe: The activation information used to store the system.
⑦restore: Used to store System Restore files. The System Restore function is called when you double-click the run Rstrui.exe file.
⑧setup: Used to store system installation files.
⑨spool: Used to store system print files. Includes print color, print pre-save, and more.
⑩wbem: Used to store WMI test programs for viewing and changing the public