Reason:

1. If you have ever used the recycle bin, it will take up space. (The default maximum value of the recycle bin is 10% of the disk space. Please check whether the recycle bin takes up the most space. )

2, system restore, when the system restore is in the monitoring state, it will take up hundreds of MB of space.

3. The virtual memory file is too large, and the page file of the virtual memory is placed under the system disk. When your computer runs too many programs at a time, this page file will swell. At the same time, resource consumption will reach the limit. Please check the Call Task Manager and close unnecessary programs.

4. The system caches files. It is almost useless to clean the cache files under the system with disk cleaner. )

5. The expansion of the registry caused by installing too much software.

Solution (please use the following carefully in some places and clean up the system by the way):

1. Open my computer-Tools-Folder Options-View-Check the "Show all files and folders" option-OK.

2. Delete the contents of the following folder:

All files under x: \ documents and settings \ user name \ cookies \ (keep index files)

All files under x: \ documents and settings \ user name \ local settings \ temp \ (user temporary files)

X: All files (page files) under \ Documents and Settings \ User Name \ Local Settings Temporary internet Files.

All files under x: \ documents and settings \ user name \ local settings \ history \ (history)

X: all files under \ documents and settings \ user name \ recent \ (shortcuts to recently browsed files)

X: all files under \ Windows \ temp \ (temporary files)

X:\WINDOWS\ServicePackFiles (backup files after upgrading sp 1 or sp2)

Compressed file under x:\WINDOWS\Driver Cache\i386 (backup file of driver)

All files under x: \ Windows \ Software Distribution \ Download.

3. If the system has been upgraded with windows update, please delete the following files:

Hidden files starting with $u ... in x:\windows\

4. Then defragment the disk, and please quit all running programs during defragmentation.

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. Open my computer-right-click the system disk-Properties-Disk Cleanup-Other options-click Cleanup in the System Restore bar-select Yes-OK.

7. After all kinds of software and hardware are installed properly, XP rarely needs to update files. Delete the system backup file: Start → Run → sfc.exe/Purge Cache nearly 3xxM. (This command is used to immediately clear the Windows File Protection file cache and release the space it occupies. )

8. Delete the dll file under \windows\system32\dllcache (minus 200——300mb). This is a backup 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\drivercache\i386 directory, and the file name is B. Just delete it directly. Usually this 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, I found that windows\ has many directories similar to $ ntuninstallq311889 $. Kill them all, 1x-3xM.

12. Besides, putting things in the \windows\help directory is also a kind of harm to me, hehe. . . Kill them all!

13. Turn off system restore: The system restore function takes up a lot of hard disk space for a long time. Therefore, manual setting is needed to reduce the hard disk occupation. Open the System Properties dialog box, select the System Restore option, and select the Turn off System Restore on all drives check box to turn off System Restore. You can also set to restore only the disk or partition where the system is located. First, select the partition where the system is located, click the "Configure" button, and cancel the "Turn off system restore of this drive" option in the pop-up dialog box, then you can set the disk space for system restore.

14, the hibernation function will take up a lot of hard disk space. If you use less, you might as well turn off * * *. To turn it off, open the Control Panel, double-click Power Options, select the Hibernation tab in the pop-up Power Options Properties dialog box, and uncheck the Enable Hibernation checkbox.

15, uninstall unused components: XP installs some system components for the operating system by default, and a large part of these components are impossible for you to use. You can uninstall them in Add/Remove Windows Components. However, some components XP are hidden by default and cannot be found in Add/Remove Windows Components. At this time, you can open the file with Notepad \ Windows \ INF \ and replace all the "hidden" characters in the file with spaces with the find/replace function. In this way, the hidden properties of all components are deleted. After saving, run the Add/Remove program, and you will see many options that you didn't see before. Delete those components you don't need (remember to save them as f instead of the default sysoc.txt), such as Internat messenger service, fax service, Windows messenger, code table, etc. , you can free up nearly 50MB of space.

16. Clear the temporary files of the system: the temporary files of the system are generally stored in two locations: a temp folder under the Windows installation directory; The other is the x:\Documents and Settings "user name" \Local Settings\Temp folder (Y: the partition where the system is located). Files in both locations can be deleted directly.

17. Erase temporary Internet files: A large number of temporary Internet files generated when surfing the Internet regularly will save a lot of hard disk space after being deleted. Open IE browser, select Internet Options from the Tools menu, select the General tab in the pop-up dialog box, click the Delete File button in the Temporary Internet Files column, select the Delete All Offline Content check box in the pop-up Delete File dialog box, and click the OK button.

18. Clear the pre-read files: Although the pre-read setting of Windows XP can improve the system speed, after a period of use, the number of files in the pre-read folder will become quite large, resulting in a long system search time. Moreover, some applications will produce dead-chain files, which will increase the search burden of the system. So these pre-read files should be deleted regularly. The expected files are stored in the Prefetch folder of the Windows XP system folder, and all files under this folder can be deleted.

19. Compress NTFS drives, files or folders: If your hard disk uses NTFS file system and space is really tight, you can also consider enabling NTFS compression. Right-click the drive you want to compress-Properties-General-Compress Disk to Save Disk Space, then click OK, and select the required option in Confirm Property Change. This can save about 20% hard disk space. When compressing drive C, it is best to use safe mode for compression, which is more effective.

20. Close Dr.Watson: To close Dr.Watson, open the registry editor, find the branch of "HKEY _ Local _ Machine \ Software \ Microsoft \ Windows NT \ Current Version \ AEDEBUG", double-click the name of the Auto key under it, change its "Numerical Data" to 0, and finally press F5 to refresh the setting to take effect, thus canceling its operation. Still in the "start"->; Enter "drwtsn32" command in "Run", or "Start"->; "program"->; "attachment"->; "system tools"->; "system information"->; "tools"->; "Dr. Watson", call out Dr. Watson in the system, and only keep the option of "Dump all thread contexts", otherwise the hard disk will be read for a long time and occupy a lot of space once the program goes wrong. If this has happened before, please find the P file, which can save tens of MB of space after deletion.

2 1, close the remote desktop: "My Computer"-> "properties"->; "Remote" and "Allow users to connect to this computer remotely" in "Remote Desktop" are ticked.

22. Cancel XP's support for zip: Windows XP turns on support for ZIP files by default, which takes up some system resources. You can choose "Start → Run", type "regsvr32/u ZIPfldr.dll" in the "Run" dialog box, and press enter to confirm that XP can cancel the support for zip decompression, thus saving system resources.

23. Turn off the error report: When the application fails, a window will pop up to send the error report. In fact, such an error report is almost meaningless to ordinary users, so it is a wise choice to close it. In the System Properties dialog box, select the Advanced tab, click the Error Reporting button, select the Disable Error Reporting option in the Error Reporting dialog box that pops up, and finally click OK. In addition, we can turn off error reporting from the group policy: type "c" from "Run", run the Group Policy Editor, expand "Computer Configuration → Management Template → System → Error Reporting Function", double-click "Error Reporting" in the setting bar on the right, and select the "Disable" radio box in the pop-up "Properties" dialog box to disable "Error Reporting".

24. Turn off unused devices: Windows XP always tries to install drivers for all devices of the computer and manage them as much as possible, which will not only slow down the system startup, but also occupy a lot of system resources. In view of this situation, in the device manager, you can disable uncommon devices, such as PCMCIA cards, modems, infrared devices, printer ports (LPT 1) or serial ports (COM 1). Double-click the device you want to disable and select Do not use this device (disable) in the General tab of its properties dialog box. Settings will take effect when you restart, and then enable these devices from Device Manager when you need to use them.

25. Regularly clean the system restore point: turn on disk cleaning, select other options-> Clean the system restore point, and click Clean.

26, uninstall unnecessary programs, I don't need to say this.

27. Other optimization: a Install the application software on other hard disks (don't install it under the system disk, which is also good for reinstalling the system); B. Transfer all My Documents folders to other partitions: right-click the My Documents icon on the desktop and select Properties-> "moving"; Transfer all IE temporary folders to other partitions: open IE browser and select "Tools"->; "internet options"->; "general"->; "settings"->; "Move folder"; Transfer the virtual memory to another hard disk; E Point all S files to one place: Control Panel → System → Performance → Advanced → Virtual Memory → Change, and the key point "Settings" will take effect; Right-click the "My Computer" icon on the desktop and select "Properties"-> "advanced-performance settings"-> "advanced-virtual memory", set according to your own situation. And clean it regularly.

Attachment: suggested setting table of virtual memory (unit: MB)

Actual memory space suggested virtual memory space

Below 128 372 ~ 744

128~256 372~5 12

256~5 12 256~5 12

5 12~ 1024 128~256

Cannot set above 1024.

Note: 1. The above contents have been strictly tested by myself, and the deletion will not cause any adverse effects on the system;

2.x stands for winxp system drive letter (the above content was determined after I synthesized several online articles and deleted them. The previous description is mainly about weight loss methods, and the latter is mainly about acceleration methods. )

3. Please use the above optimization according to the actual situation.