Why was the computer smooth when we first installed the system, but it became slower and slower after a while? Try the following points: 1, reduce the occupation of disk space 2, terminate uncommon system services 3, security issues 4, and other skills. First of all, do you really want to activate XP? No. . Exactly, do you want to be able to upgrade on the ms site? If the answer is yes, let's discuss the installation first. At present, I recommend the popular versions of V4, V5 and V6, especially V5 and V6. There was a serial number problem during installation. I suggest you calculate it on the computer first, and then install it with this serial number. Usually XP installed in this way can be updated at the MS site for free. It doesn't matter if you have installed XP, but the serial number you use is the one that everyone in the room uses everywhere. We will say later that repackaging with sysrep will solve the problem of serial number replacement. I assume that you have installed XP. Come on, baby ~~ 1. Slimming action 1. 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. 2. Delete the driver.cab file in the driver backup: %windows%\\driver cache\\i386 directory, usually this file is 76M. 3. I don't have the habit of reading help, so it is a kind of harm for me to put things in the %windows%\\help directory, hehe. . . Kill them all, nearly 4xM. 4. Later, after upgrading, you will find that %windows%\\ has many directories similar to $ ntuninstallq311889 $. Kill them all, 1x-3xM. 5. There happens to be win2000/server in the hard disk. By the way, point all the pagefile.sys files to one place: control panel → system → * function → advanced → virtual memory → change. Note that the key "Settings" will take effect. 6. Uninstall uncommon components: use Notepad to modify \\%windows%\\inf\\sysoc.inf, use the find/replace function, enter in the find box, hide, and replace all with blanks. In this way, all the "hiding" is removed. After saving the disk, run "Add-Remove Program", and you will see many more options in "Add/Remove Windows Components". Delete games, code watches and other unused things. 7. Delete input methods that are not used under \\windows\\ime and 8xM. I reinstalled my zrm input method, hehe. 8. If the space is really tight, enabling the compression function of NTFS will also use 2x% less space, but I didn't do it. 9. Turning off system restore is a disaster for people like me who often download test software. Right-click My Computer on the desktop, select Properties, find System Restore, and select Turn off System Restore on all drives. Hehe, it can save space again. 10, there are several files, which are quite large and useless. . . . Forgot the name: (The newly installed system can use the search function to find files larger than 50M, and it should be able to find them. If you can follow the above process, your original XP of 1.4G can be completely reduced to below 800. Second, the acceleration scheme WinXP will have many functions that affect the speed. Although ms says it has been optimized, there are still many things that can be customized for us. I usually do this. 1, modify the run key of the registry and cancel those things that are not commonly used, such as Windows Messenger. Enable Registry Manager: Start → Run →Regedit→ Find the key value of "HKEY _ Current _ User \ \ Software \ \ Microsoft \ \ Windows \ \ Current Version \ \ Run \ \ MSMSGS"/background, right click → Delete, and the world is much quieter. By the way, kill all those cfmon. 2. Modify the registry to reduce the waiting time of pre-reading and progress bar. The effect is that the progress bar will enter the login interface after running once. Start → Run → regedit starts the registry editor, and finds the HKEY _ local _ machine \ \ system \ \ current control set \ \ control \ session manager \ \ memory management \ \ prefetch parameter. There is a key to make Prefetcher change its value to "1". In addition, friends who don't change their hardware often can set the device type above the bus device to none in the system properties. 3. Turn off the special effects in the system properties, which is a simple and effective acceleration method. Click Start → Control Panel → System → Advanced → Performance → Settings → In the visual effect, adjust the settings to the best performance → OK. In this way, the desktop will be very similar to win2000. I still like the blue window of XP, so I checked "Use visual styles on windows and buttons" so that I can see the beautiful blue interface and speed up. 4. I use Windows commadner+Winrar to manage files, and the ZIP support of Win XP is not as good as chicken ribs for me, because no matter whether I need it or not, as soon as the system is turned on, a zip support will be opened, and the already idle system resources will be less. Click Start → Run, type "REGSVR32/U zipfldr.dll" in the middle of double quotation marks, and then press enter to confirm. The sign of success is that a prompt window appears, and the content is roughly: Dll UnrgisterServer in zipfldr.dll is successful. 5. It is said that a system of XP serves Qos, and this scheduling takes up a certain amount of network bandwidth, which is unbearable for a penniless person like me. The way to get rid of it is: start menu → run → type gpedit.msc, and the group policy window will appear. Expand "Management Template → Network", expand "QoS Packet Scheduler" and right click. After completing and applying the above modifications, users can see the QoS Packet Scheduler in the General Properties tab of the Network Connection dialog box. It means that the modification is successful, otherwise it means that the modification has failed. By the way, kill (uninstall) the Qos protocol in the network properties. 6. Quickly browse the local area network * * * Usually, when connecting other computers, Windows XP will comprehensively check all the scheduled tasks on the other computer. This check will make you wait for 30 seconds or more. The method of deletion is to start → run →Regedit→ find HKEY _ local _ machine \ \ software \ \ Microsoft \ \ Windows \ \ current version \ \ resource manager \ \ remote computer \ \ namespace in the registry. Under this key value, there will be a key {d6277990-4c6a-11cf-87-00aa0060f5bf}. After deleting and restarting the computer, Windows XP no longer checks the scheduled tasks, and the speed is obviously improved.