Steps
- Stop all unused applications. The Taskbar is on the bottom edge of the screen (unless relocated by the user). In the right side of the Taskbar appears a group of small icons, collectively named the system tray. Each of these icons represent a program that has been at least partially started or is running "in the background". Regardless of state, each represents a reduction of available memory and processing power, or resources. Closing, exiting or canceling any unused icon returns those resources to the system, and becomes available for use by the application(s) started specifically by the user.
- There is a utility built in to Windows XP and Vista called the Process Explorer. The program file is procexp.exe. This will list all programs running on your Windows system. It is more comprehensive than the Task Manager, and hovering your mouse pointer over any program name will tell you what it is.
- A utility is built into Windows that can enable/disable taskbar programs and processes from automatically loading with Windows. To access it, go to Start > Run > type in “MSCONFIG” and click OK. If you do not know what a process does, Google its name. Do not disable processes if you do not know what they do, as some are necessary for your computer to function normally.
- A useful program called "Game Booster" by the people who wrote the Advanced SystemCare V3 software will temporarily disable unnecessary background processes and boost performance on your computer when you are actively using only one program; such as a game program or video editing software. When you are finished, you can resume "normal mode" and all the background processes will be reloaded.
- Do a shut down/reboot also known as a cold reboot. Some programs do not release memory properly when they close. Even doing a warm restart will not release some of the drivers and other core programs in memory. The computer has to be completely shut down and then restarted. The Windows system is designed to hold on to those programs for a period of time. Shutting down the system for 30 seconds will cause the chips to "forget" the settings, an they will start anew when you restart the system. Curing these 'Memory Leaks' is as simple as rebooting the machine when it starts getting sluggish.
- Empty the Recycle Bin. Simply deleting files from the disk doesn't really delete them at all, rather they are moved to a temporary holding area on the hard drive for easy restoration. This area is called the Recycle Bin and is usually displayed on the Desktop. Review the contents before emptying. Once emptied, the space on the hard drive that the data occupied is made available for reuse and the restoration of files emptied from the recycle bin becomes extremely difficult. Note that this will only speed up your computer if the hard drive is nearly full.
- Uninstall all applications that are no longer needed. When applications and games are installed to a Windows PC, in addition to copying files to the new application directory, some files are written in the Windows directory structure and dozens (or more) changes are made to the Windows Registry file. Most of these changes are not readily apparent to the user, so proper removal requires uninstalling the application through the Control Panel's "Add or Remove Program" or "Programs and Features" icon. If the program is not listed in the Control Panel use the "uninstall" command provided by the application. Simply deleting the entire application directory is not the same as uninstalling, as all the files written to the Windows directory and changes to the Windows Registry file will remain and may be reloaded when the system is rebooted. Make sure that you do not uninstall any programs that are required by others. e.g. iTunes® will not work if Quicktime® is uninstalled, and many programs rely on other Microsoft programs.
- Run "Error Checking" on all hard drives. Right-click a drive icon in "My Computer" and select "Properties" followed by "Tools". Choose "Error Checking" to let the utility scan the drive for damaged files that can contribute to slow drive access speeds. This process may take several minutes or more to complete.
- Run "Defragment" on all hard drives. Right-click a drive icon in "My Computer" and select "Properties" followed by "Tools". Choose "Defragment" to let the utility clean up fragmented files and consolidate free space on the drive. This should be done at least once per week, or more often if the PC is used heavily. Some versions of Windows allow for the scheduling of this utility, and in those cases could be set to run automatically without ever having to manually run again. This process may take anywhere from several minutes to an hour or more to complete depending on size of the drive(s) and amount of unused capacity or free space. Consider starting the defragment process so that it will run over night or prior to logging off. After completion the speed of hard drive read and write times may improve significantly. There are also stand-alone defragmenting programs available from other developers available for download that may or may not charge a fee for use.
- Run CCleaner. CCleaner is a freeware application[1] that can perform an entire suite of Windows PC optimizations. Included are options to help protect privacy, system and registry cleaning among others. It has a loyal user base as shown by the number of downloads (over 300 million), is fully supported and is adware and spyware free. Follow the link above to the application's webpage for complete details. There are other system optimizers available from other developers available for download that may or may not charge a fee for use.
- Install anti-virus software and keep it current. Anti-virus (AV) software is an absolute must. There are many from which to choose at the software store, but there are free AV solutions that do a very good job, too. Three popular free AV solutions are Avast!, AVG, and Avira AntiVir. All include regular "virus definition" file updates that allow the AV program to detect and protect from the latest virii being released. Note that while installing antivirus software actually slows down your computer, it does not slow it down as much as malware does.
- Relocate the Swapfile or Virtual Memory file. These files (depending on Windows version installed) are hidden and are usually located on the Windows drive (usually "C:") If there is a second physical hard drive in the system, consider moving to the secondary drive. Ideally, these files work best when located on the fastest and largest (in terms of free space) drive in the system. The procedure for changing the location varies by version of Windows, and is not detailed here at this time as it is fairly advanced.
- Find and Delete Temporary Files. Temporary Files are used for supporting some applications for a limited period of time and left unused for later. Go to "C:\Documents and Settings\
\Local Settings\Temp" (Windows XP), "C:\Users\ \AppData\Local\Temp" (Windows Vista), or "%TEMP%" (any version of Windows) and delete all the files from this folder. If there is a problem deleting one or more files, skip those files and remove the rest. This will free a lot of space on the drive. The Temporary Internet Files directory can also be emptied - Add memory. Adding memory will boost system performance if your system does not have enough. Generally having twice the recommended hardware for an operating system will yield good performance. The hardware specifications may be found on the Microsoft website or on Wikipedia. While unfortunately not a free solution, it is one of the most effective ways of boosting performance. The computer's operating system is important to know when selecting memory upgrades. Newer computers run either 32 bit or 64 bit operating systems. A 64 bit (x64 or x86-64) Windows Operating System can support more memory than is currently available, whereas a 32 bit (x86) version of Windows will only recognize up to 3.25 - 3.5 GB regardless of how much more is installed. Increasing the amount of memory installed reduces the need for the computer to keep reading data from the hard drive (which is slower), since it can keep it in the memory. Regardless if the computer is running a 32 bit or 64 bit Operating System, check the motherboard or system documentation to determine size, type, speed and permissible configurations of memory before purchasing and installing additional memory. A 64 bit operating system and a 64 bit motherboard and CPU are required to use more than 4 GB of memory. Systems with lower amounts of memory (256 MB to 1 GB) installed receive the greatest boost when increased to 2 GB or more (as this represents a 100-400% increase in system memory). 32 bit systems that already have 2 GB or more already installed receive a less noticeable boost when upgraded, as most of the extra memory will go unused.
- Replace your main hard drive and keep it cool: It has been observed, particularly on laptops, that replacing the hard disk without changing anything else (i.e. by a direct sector to sector copy) can drastically speed-up an old PC... which will slow down again after some time. This suggests that, especially on laptop computers, hard drive overheating can produce bad sectors, which are quickly detected and moved/hidden by the hard drive itself. But, in the mean time, this causes some hidden frangmentation which may slow down the whole computer.
- Be realistic. The "high end" computer purchased as new 5 years ago may run the latest version of Windows, but that doesn't mean that it will do it very well. Technology marches on and it seems there is a game of "one-up-man-ship" played between software developers and hardware designers. Regardless, eventually new software will require new hardware or vice-versa. It seems that the amount of frustration you can endure best determines how long you will run your current setup.
- Original OS. Restore the original operating system it came with. If it's an old windows 3.1 machine, put 3.1 back on and it will probably run like new. Be aware though, web security software and browsers are rarely backward compatable to a machine of this vintage.
source : www.wikihow.com