2. Open the Explorer and navigate to "C:\windows\winsxs\Backup", which is usually a backup file of windows. You can delete all the files in it. Right-click the backup folder and select Delete from the right-click menu that appears.
3. If you want to delete other files, you can find out the meaning of the folder in drive C, and you can know which files can be deleted and which files cannot be deleted according to the following relevant information.
├-WINDOWS
│ ├-system32 (used to store Windows system files and hardware drivers)
│ │ ├-config (user configuration information and password information)
│ │ ├-systemprofile (system configuration information, used to restore the system)
│ │ ├-drivers (used to store hardware driver files, and deletion is not recommended)
│ │ ├-spool (used to store system print files. Including printing colors, pre-stored printing, etc. )
│ │ ├-wbem (WMI test program stores model classes, instances and methods for viewing and changing public information. Please do not delete)
│ │ ├-IME (used to store system input method files, similar to the IME folder under WINDOWS)
│ │ ├-CatRoot (computer startup detection information directory, including hardware and software information detected when the computer starts)
│ │ ├-DllCache (used to store system cache files. When the system file is replaced, the file protection mechanism will copy the files in this folder to overwrite the non-system files)
│ │ ├-GroupPolicy (Group Policy Folder)
│ │
│ ├-system (system folder, used to store system virtual device files)
│ ├-$NtUninstall$ (every time the system is patched, the system will automatically create such a directory, which can be deleted)
│ ├-security (system security folder, used to store important data files of the system)
│ ├-srchasst (search assistant folder, used to store system search assistant files, similar to msagent folder)
│ ├-repair (system repair folder, used to store configuration files needed to repair the system)
│ ├-Downloaded program file (downloaded program folder, used to store plug-ins such as ActiveX that extend IE function)
│ ├-inf (used to store inf files. The most common application of INF files is to provide driver services for hardware devices, and it is not recommended to delete them. )
│ ├-Help(Windows help file, which can be deleted)
│ ├-msagent (Microsoft assistant folder, which stores dynamic cartoon images to help you use the system better. If it is not necessary, it can be deleted directly)
│ ├-Mui (multilingual language pack folder, used to store multilingual files. In Simplified Chinese system, this folder is empty by default, but deleting this folder is not recommended. )
│ ├-java (stores components running in java and their program files. Deleting files in it is not recommended)
│ ├-addins (system additional folder, used to store files with additional functions of the system)
│ ├-Connection Wizard (Connection Wizard folder, used to store related files of Internet connection wizard)
│ ├-Driver cache (driver cache folder, used to store driver files of known hardware in the system)
│ │ └-i386 (known hardware driver files that come with Windows operating system can be deleted to save space)
│ ├-TEMP (temporary system folder, all contents of which can be deleted)
│ ├-twain_32 (scanner related)
│ ├-AppPatch (application patch backup folder, used to store application patch files)
│ ├-Debug (system debugging folder, used to store the log files of debugging modules when the system is running)
│ ├-Resources (system resource folder, used to store system SHELL resource files, which is the theme we see on the desktop)
│ │ └-Themes (desktop themes are stored here, and useless themes can be deleted)
│ ├-WinSxS (storing all versions of Windows XP components to reduce configuration problems caused by DLL files) │ ├-ime (input method information)
│ ├-PCHealth (used to store files for coordinating, configuring and managing the normal operation of computers)
│ ├-Prefetch (pre-read folder, which is used to store the pre-read information of files that have been accessed by the system (these information are new information automatically generated when the system accesses), so as to speed up the access speed of files, and the extension is "PF". You can delete files in this folder)
│ ├-pss (used to backup system startup configuration files. Three files, namely "Boot.ini", "System.ini" and "Win.ini", are generally backed up with the extension "backup". If the original three files of the system are damaged, you can recover them from here. Delete is not recommended)
│ ├-Registration (registration folder, used to store related files registered by COM+ or other components of the system. Deleting files here is not recommended)
│ └-Downloaded installation (storing some installation programs using Windows Installer technology, mainly used for repairing programs, etc. )
├-Documents and settings
│ ├-Default user
│ │ ├-Application data (general application data folder. Here are some special data of installed applications)
-temp (temporary file directory. This is where temporary files generated during the running of the system and software are stored. Need to be cleaned regularly)
│ │ └-Temporary Internet files (temporary Internet folders. Need to be cleaned regularly)
│ ├-All users (all user folders, the changes here are valid for all users)
├-Program file
│ ├-WindowsUpdate (for Windows upgrade, it can be deleted)
│ ├-Uninstall information (storing software anti-installation information, which may cause some software to be uninstalled after deletion and cannot be deleted)
4. If you feel that it is troublesome to manually delete one by one, you can use optimization software, such as Rubik's Cube Master Software, find the "Cleaning Master" tool, then switch to the "System Slimming" tab at the top, and then click the "System Disk Analysis" button at the lower left corner of the interface to start analyzing the system disk. After the analysis, you can select the check box to select the items to delete.