At the beginning of the purchase, the huge memory with "extremely fast" speed, why did it run slower and slower? Running a program is like an old cow pulling a cart. In order to spare you the pain of buying new memory, this newspaper specially interviewed Liu Lei, a computer expert in the Computer Department of Beijing University of Technology, and asked him to suggest some ways to improve the computer speed without spending money.

System files "bear the brunt"

The operating system of home computers ranges from windows95 to windows98 and windowsXP, which are widely used now. With the powerful functions of the system, the files of the operating system are more and more "occupied". Deleting unnecessary "trivialities" in the usual system will reduce the load of system operation.

Tips: There are nearly 250MB files in the "ystem32dllcache" directory of system files, which are used to restore the system files of windowsXP. Users who use computers normally don't need them at all. They can back them up to other places and delete them from the system files, and the system will be "refreshed" immediately.

Temporary files should be deleted.

In order to open the webpage quickly every time you surf the Internet, many websites will automatically save "temporary files" of the fixed content of the website for users who surf the Internet. But if every website will store "temporary files", it will be a heavy burden on the computer's memory.

Tips: Computer users can completely delete the "temporary files" of websites they don't visit frequently. Users can first open IE browser, select Internet Options from the Tools menu, and delete the webpage files in the Temporary Internet Files column.

Anti-virus removal of backdoor program

Another factor that affects the running speed of windows system is the backdoor program that some websites "implant" when logging in. This backdoor program sometimes starts at startup, which affects the startup speed, and sometimes starts when the webpage is opened, causing the computer to crash.

Tips: users should pay attention to killing viruses frequently when using. This kind of less aggressive backdoor program can generally be found by antivirus software. Users can also select "Show All Files and Folders" in the "Folders" option in "Tools" in daily use, so that all hidden programs are exposed, and users can delete useless hidden programs in time.

Defragmentation, optimization and optimization master, and delete unused programs.

You can also adjust the registration form.

1, speed up switching.

When shutting down in Windows XP, the system will send messages to running programs and remote servers, telling them that the system should be shut down, and wait for a response before the system starts to shut down. To speed up the startup, you can set the task to end automatically first. First, find HKEY _ Current _ User Control Panel Desktop, and set the key value of AutoEndTasks as 1. Then there is a "HungAppTimeout" under this branch, and its value is changed to "4000 (or below), and the default is 50000; Finally, find HKEY _ local _ MachinerSystemCurrentControlSetControl, and also set WaitToKillServiceTimeout to "4000"; Setting the shutdown speed in this way is obviously much faster.

2, improve the broadband speed

Windows XP Professional Edition reserves 20% bandwidth by default, which has no effect on our individual users. It is better to make full use of it than to leave it idle.

Enter gpedit.msc in Start → Run to open the Group Policy Editor. Find "Computer Configuration → Management Template → Network →QoS Packet Scheduler", select "Restrict Reserved Bandwidth" on the right, select "Properties" to open the dialog box of Restrict Reserved Bandwidth, and select "Enable" to change the original "20" to "0" to release the reserved bandwidth.

3. Optimize online neighbors

When using Windows XP, the system will search its own * * * shared directory, which can be used as a printer for the network * *, as well as the planned tasks related to the network, and then it will be displayed, which will obviously be much slower. These functions can be deleted if they are of little use to us. Find the current version of HKEY _ local _ MachinesofWareMicrosoft Windows Explorer Remote Media Space in the Registry Editor, delete (printer) and its {D6277990-4C6A-1/F8D87-00060F5 BF}, restart the computer and access the Internet again.

4. accelerate the start.

Speed up the startup of Windows XP. You can achieve this goal by modifying the registry. In the registry editor, find HKEY _ local _ machine system CurrentControlSetControlSession to manage PrefetchParameters, find the EnablePrefetcher primary key on the right, and change its default value of 3 to 1, so that the scrolling time of the scroll bar will be reduced.

5. Automatically close the stop response program.

Sometimes XP will prompt you that a program stops responding, which is very annoying. By modifying the registry, we can close it ourselves. In HKEY _ Current _ User Control Panel desktop, we can change the numerical data of the character key value of AutoEndTasks to 1, and then log off or restart.

6. Speed up the menu display.

In order to speed up the display of the menu, we can set it as follows: we can find the "MenuShowDelay" primary key under the desktop of HKEY _ Current _ User Control Panel and change its value to "0" to speed up the display of the menu.

7. Clear the unused DLL files in the memory.

In hkkey _ local _ machinesoftwindowscurrent version of the registry, add an AlwaysUnloadDLL in Explorer, and the default value is set to 1. Note: If the default value is set to 0, this function will be disabled.

8, speed up the pre-reading ability to improve the boot speed

Windows XP pre-reading settings can improve the system speed and speed up the boot. According to the following methods, the CPU efficiency can be further utilized: HKEY _ Local _ Machine System CurrentControlSetControlSessionManager Memory Management]. In the window on the right side of PrefetchParameters, modify the numerical data of EnablePrefetcher as follows. For example, if you use a CPU with PIII 800MHz or above, it is recommended to change the numerical data to 4 or 5, otherwise it is recommended to keep the numerical data as the default value, that is, 3.

9. Reduce the loading of projects at startup.

Many applications will join the system startup group when they are installed, and the system will run automatically every time it is started, which not only prolongs the startup time, but also consumes system resources after the startup is completed!

Start the system configuration utility, and list the projects and sources loaded when the system starts in the "Start" project. Check carefully whether it needs to load automatically, otherwise clear the check box in front of the item. The fewer projects you load, the faster you start. The project needs to be restarted to take effect.

Clean up useless junk files and optimize the system. ...

I offer several methods here!

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 by windoes updade, 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\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, 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. 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 to 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 in XP are hidden by default and cannot be found in Add/Remove Windows Components. At this time, you can open the file \windows\inf\sysoc.inf with Notepad, 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 removed. 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 sysoc.inf instead of the default sysoc.txt), such as Internat messenger service, fax service, Windows messenger, code table, etc. , can release 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 look for the user.dmp 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 gpedit.msc 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 and select other options-> Clean up the system restore point, and then 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 pagefile.sys files to one place: Control Panel → System → Performance → Advanced → Virtual Memory → Change. Note that "Settings" will take effect;

Right-click the "My Computer" icon on the desktop and select "Properties"-> "advanced-performance settings"->; Advanced-Virtual Memory, set to 330-720. And clean it regularly.

① Use the external command "undelete" provided by the high-level DOS with the function of restoring and deleting files, but when using it to restore and delete files, you need to specify the file name and allow wildcards to be used in the file name.

What should I do if I need to restore the files in the recycle bin when Windows can't start? At this time, first enter the DOS mode and enter the C:\RECYCLED directory, which is a hidden directory. If the file to be recovered was originally on disk D, the corresponding directory is D:\RECYCLED. With the dir/a command, you can list a series of hidden files starting with DC, which are the files that you initially deleted. Because Windows changed the file name when it moved the file to the Recycle Bin, it is necessary to retrieve the original file name. The original file name can be found in the INFO2 file in the recycle bin directory. INFO2 is a binary file, and each deleted file has a record (800 bytes) in the INFO2 file, where the file name can be found. The file names are arranged in order. The first file name is DC 1. *, the original file name and extension of the file remain unchanged. If the directory is deleted, there is a directory named DC under RECYLED, and the original directory name can be retrieved in the same way.

2. Recovery of error format

Because the formatter (advanced format, such as the formatter under DOS) did not clear the file data on the hard disk, but rewritten the FAT table, as for the partitioned hard disk, only the MBR and DBR were modified, and most of the file data were not destroyed, so many hard disk data can be recovered. Of course, we can effectively recover the data on the formatted hard disk with the help of some tools and software, but the trouble is inevitable and there is no guarantee that all the data can be recovered.