1. Check "OK" 2 before opening the option of My Computer-Tools-Folder Options-View-Show All Files and Folders. Delete all files in the following folder: x: \ documents and settings \ user name \ cookies \ (keep index files). Documents and Settings\ user name \ local settings \ temp \ x: documents and settings \ user name \ local settings \ temporary internet files \ x: \ Documents and Settings \ user name \ local settings \ history \ x: documents and settings \ user name \ recent \ x: \ Windows \ temp \ x: \ Windows \ ServicePackFiles (backup files after upgrading sp 1 or sp2) Compressed files under X:driver car If the system has been upgraded through windoes updade, please delete the following files: hidden files under x:\windows\, starting from $u ... 4. Then defragment the disk. During the defragmentation process, please exit all running programs. 5. After defragmentation, open Start-Programs-Accessories-System Tools-System Restore-Create a restore point (it is best to use the current date as the name of the restore point). 6. Turn on my computer-right click on the system disk-Properties-Disk cleaning-Delete the system backup file: Start → Run → sfc.exe/Purge Cache nearly 3xxM. (The function of this command is to clear the cache of Windows File Protection file immediately and release the space occupied by it. 8. Delete the dll file under \windows\system32\dllcache (minus 200——300mb), which is a spare dll file. As long as you copy the installation file, you can do it completely. 9.XP will automatically back up the hardware driver, but it is generally unlikely to change the hardware after the hardware driver is installed correctly, so you can also consider deleting this backup. The file is located in the \windows\driver cache\i386 directory and named driver.cab You can delete it directly, usually the file is 74M. 10, delete unused input methods: For many netizens, not all input methods included in the Windows XPt system are suitable for their own use, such as IMJP8_ 1 Japanese input method and IMKR6_ 1 Korean input method. We can delete them if it is not necessary. Input method is located in \windows\ime\ folder, occupying 88M space. 1 1. After upgrading, it is found that windows\ has many directories similar to $ ntuninstallq311889 $,which can be deleted. In addition, files in the \windows\help directory are also available. Reference: /626 128 1.html