0 1. Turn off System Restore (Desktop-My Computer-Properties-System Restore, select Turn off System Restore on all drives);
02. delete the folder C:\Windows\System32\Dllcache (this file is a backup file and can be deleted. The folder itself cannot be deleted, so all the files in the folder will be deleted);
03. Go back to the root directory of drive C, and if there are folders numbered as FOUND.000, delete them all (these folders are generated during disk inspection, and the files inside are recovered fragments. If you are sure that no files are lost, you can safely delete them; Several other partitions also delete this folder);
04. Delete the system information folder under the root directory of drive C (this folder stores files restored and backed up by the system, and other partitions are also deleted);
05. Enter C:\Windows and delete all *. Log files (many of these log files are useless, and some will be regenerated when the computer starts. The search function is recommended. Some log files can't be deleted, so you can use Unlocker to delete them);
06. Delete all *. Bmp files under C:\Windows (these are ugly pictures used as desktop background, and no one wants to use these pictures as desktop anyway, just delete them directly);
07. Delete the folder C: \ Windows \ Download Installations (backup installation files);
08. Delete the folder C:\Windows\Driver Cache (backup the hardware driver, and leave SP 1.cab or SP2)； if you are worried); . Cab, respectively corresponding to SP 1 and SP2);
09. Enter the help folder, delete all files, enter each folder separately, and delete all files (provided that you are sure that you don't need to use the help function, but I think everyone is basically not interested in reading the help files. The only file that is difficult to delete here is tour.exe under C:\WINDOWS\Help\Tours\mmTour. If your computer doesn't have Flashplayer installed, you can use it to play swf files);
10. Enter C:\Windows\Installer to delete unnecessary file installation sources; If Office is installed, go to {90110804-6000-1d3-8cfe-0150048383c9} and delete the icons of the components that are not installed. );
1 1. If you don't need the system voice prompt, you can delete the media folder, but it is recommended not to delete it;
12. Open the registry, navigate to HKEY _ local _ machine \ system \ currentcontrolset \ control \ SessionManager \ memory management \ prefetch parameter, set the value of EnablePrefetcher to 0, and then delete the folder C:\Windows\Prefetch (disable startup prefetch);
13. Delete the folder C:\Windows\Temp (various temporary files generated);
14. Delete the folder C:\Windows\Web\WallPaper (the wallpaper that comes with the system, you can leave what you like);
15. Delete the theme files and folders marked as unnecessary under C:\Windows\Resources\Themes (only one and at least one can be kept);
16. Delete the files of Korean and Japanese input methods under C:\Windows\Ime (delete each file, or use the XP slimming tool that comes with Perfect Uninstall);
17. Delete fonts that are not used under C:\Windows\Fonts (there is a certain risk that the default fonts of computers may be changed. It is recommended not to delete Arial, Verdan, Tahoma, Times New Roman, etc. );
18. Delete all files under C:\Windows\System32\Ime (except some input methods installed by yourself, such as purple light input method);
19. Delete numbered folders (remember to keep 1033 and 2052);
20. Delete all *. Bmp file under C:\Windows\System32;
2 1. Delete all *. Gif files under C:\Windows\System32 and C:\Windows;
22. Sort by type and delete all files except msctfime.ime in *. Ime file. If the input method has been installed, remember not to delete it by mistake.
23. If you don't need a screen saver, please delete all *. Scr file;
24. Delete all *. Chm file;
25. Delete all *. Hlp file;
26. delete the folder c: \ documents and settings \ user name \ local settings \ temp;
27. delete all items under c: \ documents and settings \ user name \ local settings \ history;
28. delete all items under c: \ documents and settings \ user name \ local settings \ temporary internet files;
29. delete the IconCache.db file under c: \ documents and settings \ user name \ local settings \ application data;
30. Delete all files except wmdbexport.xml under C: \ Documents and Settings \ User Name \ Local Settings \ Application Data \ Microsoft \ Media Player;
3 1. Delete all icons of * * * files in my document;
32. If the Ziguang input method is installed, delete the folder C: \ documents and settings \ all user \ application data \ unispim;
33. Delete all * * * documents under c: \ documents and settings \ all users \ documents;
34. If Rising or other antivirus software is installed, delete the virus files they backed up;
35. Delete three hidden folders (uninstall information, InstallShield installation information and Windows Update) under C:\Program Files;
36. If you don't like the appearance of Windows Media Player, you can delete all files under C: \ Program Files \ Windows Media Player \ Skins (but it is recommended to keep at least one) and delete the Setup folder (if any);
37. Delete the media files under C:\Program Files\Movie Maker (if any);
38. If you know enough about the system, you can uninstall PCHealth；;
39. If the system is patched, there will be many hidden folders starting with $ under C:\Windows, and all of them will be deleted;
40. Folder option, view, and choose not to cache thumbnails;
4 1. Search all *. ? $、*.？ ~、*.~*、*.bak*、chklist。 *, *.chk, *ftg, *fts, *gid, * old. prv 、*err、errorlog.txt、*。 tmp 、~*。 *、*._mp 、*。 Sydney. Dietz. Dmp, * world bank. xlk 、*spc 、*cdr_、*。 #res 、*。 mch，*。 $ $ $,*. @ @, *.-,mscreate.dir, 0.nch, Thumbs.db files, and delete them;
42. Control panel, power supply, turn off hibernation;
43. After updating the driver, the folder under ... C:\Windows\System32 will be reinstalled. If the driver is ok, it can be deleted;
44. Run add and remove programs-add and remove windows components, and delete Windows Messenger and games in attachments and tools;
45. Empty the recycle bin;
46. Set the virtual memory to other partitions, restart and delete the pagefile.sys file in the root directory of drive C;