If computer slows down suddenly, have you ever wondered whether you have done something wrong that reduce computer speed? In fact, you do not mind overly. Since any tiny changes in the computer can slow down computer, the important is how you do to fix slow computer one by one.

#1 Regroup hard disk on regular

Sector is the smallest part of hard disk. A file may take up certain sectors. And since you have added, changed or deleted such files, it can bring about a lot of discontinuous sectors which can slow down computer definitely. To put in a simple way, when computer wants to read files, it has to visit different places so as to get the complete file. That is why you are suffering from slow computer.

See, you can not avoid slow computer in this regard but are able to speed up computer. That is to defragment disk which does well to computer performance indeed. At the same time, you should set the proper time to make computer run like new, since too much defragmentation can do harm to computer rather than improve computer performance.

#2 Set virtual memory

Theoretically, a large number of data swap files are created in the hard disks which serve for keeping virtual memory temporarily. Since computer can not provide enough ram to support many large applications running, it is necessary to use virtual memory. In other words, it lays great influence on computer speed by reading this file.

So here is another way to fix slow computer problems. Although Windows can administrate virtual memory automatically, such changes will add extra load to the system and then slow down computer. In this regard, you had better set the maximum and minimum values by hand so as to improve computer performance.

Javasign.exe is an extremely vital part of Windows operating system. Javasign.exe is an important process which executes dll files and locate their libraries into windows system’s memory. If there is something wrong with javasign.exe on your computer then the whole PC probably can not run stable and would be deathly slow.

Process javasign.exe is located in the system directory: C:\windows\system32. If you find that this process executes and runs from any other suspicious locations, I advice you fully scan your computer with anti-virus program. Because such fishy phenomenon could be caused by virus or trojan horse. Some of the viruses will disguise javasign.exe running on your computer to attack the system and steal important data. We classify those viruse fraudulently using the name javasign.exe to Miroot. Win32. Worm. Backdoor.Lastdoor. and Trojan.

Step 1 speed up Windows XP: Clean junk

After that, please go to C drive and clean junks there. There is the culprit of slow running Windows XP.

On one hand, Windows-based systems leave certain holes for system junks. One the other hand, Windows also offer many solutions to fix them. As a result, you can turn to certain programs to help you improve computer speed. For example, disk defragmenting and disk cleanup programs to halt slow running Windows XP. They are quite useful tools indeed but to be frankly, it will take a lot of time to finish the task if you have a mess of junks in the system.

Step 2 speed up Windows XP: Anti-virus software

It is without question that powerful anti-virus software assists computer to run smoothly and safely. Although its real-time monitoring function may slow down PC to some extent, a virus can drop Windows XP speed, even lead to the whole system go crashed.

Step 3 speed up Windows XP: Clean registry

Thirdly, slow running Windows XP may result from a bulky registry. Working as the database of Windows, registry has to keep the information of computer, useful or useless. That is the main cause that computer is running slower and slower but you can not find any tangible reason accounted for that. Therefore, professional registry software can help you scan thoroughly and distinguish the bad, corrupted or damaged entries from those good, useful and important ones.

<b>You should not neglect the influence of using character on computer speed. </b>

Although Microsoft claims that Windows operating systems can install over one thousand of characters, in fact, more than five hundred can bring about problems to your computer. For example, the character disappears from listing of applications and Windows startup speed falls obviously. Therefore, you can delete those characters that you do not use usually. Meanwhile, you are supposed to backup them in case any accidents happen in the future.

<b>You can simplify Windows system. </b>

Compared to DOS system, Windows is too bulky and becoming larger and larger as the daily operations such as installing new software, loading runtime library, adding new games and so on. What is worse, the registry and runtime library along with the directory become larger without question. Even though you have deleted certain program, its DLL files still exist there. As time goes by, DLL dynamic link library is increasing day by day when starting or exiting Windows. That is why system is running slower and slower. At this moment you need to get rid of those DLL programs completely. It is suggested that you can reinstall your system at proper time.

<b>You should clear up file fragments in the hard disk regularly. </b>

Hard disk is one of the computer assemblies that are used frequently. If you perform too many operations to hard disks, it can make files restore discontinuously and takes longer and longer to read files. At this time, you need to use disk defragmenting program provided by Windows systems. Such program is able to rearrange the files and available space in the hard disks in order to speed up file reading and program running. And at the same time, it can monitor software’s loading frequency and put frequently-used application into read fastest disk position so as to reduce the time to search for tracks as much as possible. By doing this, it can accelerate reading speed. You can start this program in “Start”—“All Programs”—“Accessories”—“System Tools”—“Disk Defragmenter”.  Disk defragmentation can optimize computer performance for sure, it is worthwhile having a try. Or, you can use other specific defragmenting programs to help you if you dislike the slow speed of Windows program.

<b>Besides, you can delete starting random programs. </b>

What is starting random program? It is the program loaded when booting system. They can not only slow down booting speed but also expend computer resource and memory faster. You can type “Msconfig” in the “Run” to open system configuration to stop those disturbing programs.

By reading this article, I am sure you can learn some ways to optimize computer performance. But it is far from enough toimprove computer speed, you ought to get more knowledge in this regard.

Therefore, it is a must to learn what such temporary files are on earth and how to remove them completely so as to speed up computer.

First of all, let us see what types of temporary files.

1. Temporary files come from installing software.

It is normal that software may decompress and put installing files into a temporary directory before installing to the system. However if there is any problem in the software of system, such temporary files may have turned to junk in the hard disk.

1. Temporary files are from running programs.

Like installing process, it is possible to produce these junks when software is running.

When running programs, it is usually to create many temporary and swap files such as the ones of backing up, anti-virus software or spare files which are produced when system software is checking hard disks.

1. Files are left by uninstalling software.

It is hard to compliment the anti-installing mechanism of Windows, plus most software is with dynamic library links files which are complicated to delete. That is why it is quite difficult to remove such software root and branch.

1. Temporary files are produced when surfing on the Internet.

You may not know that browser can download part of page files to your computer which cannot only take up hard disk space but also reveal your privacy. What is worse, it is easy to produce other rubbish such as history record, temporary and cache files, cookie and so on.

Well, how to get rid of these junk files?

Since you have already known the main resource of junk files, it is OK that you find the root of such junk files if you want to remove them by hand. But if the number of the rubbish is too large to finish the task easily and quickly, will you continue to do that without changing other methods? Such files are bound to be deleted for sure, the question is what you should do that efficiently.

First of all, it is necessary to get basic understanding of Internet History. History folder has a record of the websites that you have visited recently. If it is Win2k, it can memorize operated files. In this way, system can monitor all the operations in this computer.

Well, it is not an alarmist talk indeed. All the operation can be recorded by the system automatically. Therefore, you must wipe them out thoroughly so as to protect your privacy. Here are the tips to do that step by step:

Open an Internet windows, click “Tools” > “Internet Options”.

In the “General” tab, find “History Record” column, set number of keeping pages days as you like, and then click “Clean History” and “OK”, you can find that all the websites with Http:// are deleted.

Or you can open: C: /windows/history. There are two types of files in this folder: one is record of browsed websites and another is about “My Computer” which memorizes various programs downloaded from Internet. You can delete them because they take up disk space as well.

If you want to save time and energy and do not want to save any websites in your address bar, you can try to set the keeping days as “0” and click “OK”. You may find all the information has been wiped out completely.

If you use Windows-based systems for ages, it is probably that the system has been crammed with a mess of junk files. As a machine needed clear up dust, your computer requires regular maintenance as well. Here are three tips for you to clean system completely.

1. Clear up registry. Every time you add or remove software, a plenty of dynamic library link files are left in the system positively or passively. As some are useless and redundant files, you can delete them without hesitation. Here is a method for you to do that manually.

In the “Registry Editor”, find out “HKEY/LOCAL/MACHINE/Software/Microsoft /Windows/Current Version/Share DLLs”, this item contains shared information of such files after installing applications to computer. You can check the number of DLL files by every key value. And if the value shows “0”, you can delete this file because it means nothing for you. But since registry is the database of computer, you cannot be too cautious to clean up it.

2. Defragment disk. Hard disk may be in a mess since you have used it for ages. Since Disk fragments slow down read-write speed of hard disk and system efficiency, you can use defragmenting programs of Windows to clear up them. But it is really slow and time-consuming so to choose a powerful and specific tool is the best choose. No matter you use it or other third-party defrags, do remember to do that regularly to speed up computer.

3. Remove junk and duplicate files in the system. As system is working for you for a long time, it is inevitable to create lots and lots of junk files. They are not fragments that can be rearranged again but just unnecessary files any more. Therefore, you should remove such junk and duplicate files so as to clean system. As they hide in the every corner of your computer, it is wise for you to get rid of them by using professional duplicate file cleaner rather than doing that manually.

Although Windows XP has stable and perfect interface and multifunctional operating system, it has also certain shortages. Since upgrading hardware is a complex task, you can do some optimization to improve Windows XP speed. Here are some methods to do that.

You can start up the function of ending task automatically as shutting down computer. When closing down computer, it may pop up a dialog box that reminds you certain program is running and whether to end task. It is really disturbing. In fact you just need to alter a little in the registry that the computer can end tasks automatically as shutting down computer. In the “Registry Editor”, find HKEY-CURRENT-USER/Control Panel/Desktop directory, change the key value of “Auto End Tasks” as “1”. In this way, computer will end task voluntarily and can

Close down the function of “Use Fast User Switching”.

In this system, such function should come to front because it enables many users to use computer at the same time. But it also consumes certain memory. If the memory is 64MB, the system will turn it off automatically when installing; if it is 128MB, it is better for you to close it down manually. In the “Control Panel”—“User Accounts”—“Change the way users log on or off”, cross out “Use Fast User Switching” and then click “Apply”. You may find computer speed is quite faster than before.

You can turn off Dr. Watson. This is the maintenance tool of Windows. It can display when loading programs is failed or computer goes crash. As running this, you can cross out all except dumping the entire thread context. Otherwise once there is something wrong in the computer, hard disk has to respond for a long time and it can take up a lot of disk space as well. If you have encountered such problem before, you can look up and delete the user.dmp file. By doing this, it can save scores of space for you and improve Windows speed a lot.

To reinstall system is thorough but tedious process is it? So, to use space files should be your first and best choice. Here is some useful knowledge about backup file you cannot miss.

Why it is a must to back up Windows XP?

Although Windows XP is quite popular by its powerful functions and friendly operating interface, it cannot deny that this system is still vulnerable to virus from Internet, malfunction of hardware and software and mistakes of users themselves. As a result, most users have to face a problem to restore system when system is destroyed seriously even cannot work normally.

Basically, there are two methods to restore system: one is to use necessary software and reinstall system and another is to back up system partition.

The latter is more attainable because it has three advantages at least.

First, it can backup both operating system and application. Second, compared with reinstalling system and software, to back file can save a lot of time and energy. Third, all the system backup files can be used all the other computers.

Since many Windows-based operating systems have provided the function of backing up system files, it is quite convenient to back up and restore files without using other software. However, as is known to all that, it really takes up time and disk space to do that.

And as Windows XP is really a bulk, you should not add too many programs to the partition where also restore system. In order to increase available disk space, you need to clean such backup files very well. Besides, it is better to backup files immediately after reinstalling system.

However there are still some problems you have to face. Every time you back up file after reinstalling system, there must be a large number of spare files in your system if you do that several times. It is another headache as long as you want a thoroughly clean system. The more you use spare files, the more junk and duplicate files in the system without question. What is worse, it is tedious and difficult to find those duplicate backup files in the system.

Although this system is blessed with so many wonderful functions, you have to pay for it or tolerate certain flaws, for example, more ram is required supporting Windows Vista. Do not worry; there are measures to fix the problem efficiently.

1. speed up Windows Vista: Close down certain services and unwanted programs

Open up “Control Panel” and uninstall certain programs that mean nothing to you any more. Meanwhile, some services are also of litter value for high Windows performance, just disable them immediately. By doing this, it can save a lot of space. This may be the great help that these services can do for computer. They include “Hibernation”, “Error Reporting”, “Offline Files”, to name but a few.

2.  speed up Windows Vista – Defragment your hard drive

Almost every storage action like creating, deleting, moving and copying files will cause the generation of fragmentation, As the amount of fragments grows over time, the hard drive will read and merge these separate fragments every time you launch a program or open a file, eventually the computer will be come slower and slower. Defragment the hard drive will help rearranging the separated file information and put them into continuous space. It will speed up computer remarkably. Remember to defragment regularly which is a very good practice to

3. speed up Windows Vista – clean out Windows registry

This is a very important step to speed up Windows Vista. Windows registry is just like a database which stores all the computer information. Every time you install a program, save a files or install a new driver on your computer, the registry keeps a record which called entry, these entries will be left in the registry even the related programs/files/drivers/ were removed thus make them obsolete even corrupted. That is the biggest reason for a slow running computer, if you keep ignoring these wasted entries, error messages might pop up from time to time and even crash your computer eventually.