What you need to do is...
1. Disable Indexing Services
Indexing Services is a small little program that uses large amounts of RAM and can often make a computer endlessly loud and noisy. This system process indexes and updates lists of all the files that are on your computer. It does this so that when you do a search for something on your computer, it will search faster by scanning the index lists. If you don’t search your computer often, or even if you do search often, this system service is completely unnecessary. To disable do the following:
Go to Start
Click Settings
Click Control Panel
Double-click Add/Remove Programs
Click the Add/Remove Window Components
Uncheck the Indexing services
Click Next
2. Optimise Display Settings
Windows XP can look sexy but displaying all the visual items can waste system resources. To optimise:
Go to Start
Click Settings
Click Control Panel
Click System
Click Advanced tab
In the Performance tab click Settings
Leave only the following ticked:
Show shadows under menus
Show shadows under mouse pointer
Show translucent selection rectangle
Use drop shadows for icons labels on the desktop
Use visual styles on windows and buttons
3. Speedup Folder Browsing
You may have noticed that everytime you open my computer to browse folders that there is a slight delay. This is because Windows XP automatically searches for network files and printers everytime you open Windows Explorer. To fix this and to increase browsing significantly:
Open My Computer
Click on Tools menu
Click on Folder Options
Click on the View tab.
Uncheck the Automatically search for network folders and printers check box
Click Apply
Click Ok
Reboot your computer
4. Disable Performance Counters
Windows XP has a performance monitor utility which monitors several areas of your PC’s performance. These utilities take up system resources so disabling is a good idea.
To disable:
download and install the Extensible Performance Counter List
Then select each counter in turn in the ‘Extensible performance counters’ window and clear the ‘performance counters enabled’ checkbox at the bottom.button below
5. Improve Memory Usage
Cacheman Improves the performance of your computer by optimizing the disk cache, memory and a number of other settings.
Once Installed:
Go to Show Wizard and select All
Run all the wizards by selecting Next or Finished until you are back to the main menu. Use the defaults unless you know exactly what you are doing
Exit and Save Cacheman
Restart Windows
6. Optimise your internet connection
There are lots of ways to do this but by far the easiest is to run TCP/IP Optimizer.
Download and install
Click the General Settings tab and select your Connection Speed (Kbps)
Click Network Adapter and choose the interface you use to connect to the Internet
Check Optimal Settings then Apply
Reboot
7. Optimise Your Pagefile
If you give your pagefile a fixed size it saves the operating system from needing to resize the page file.
Right click on My Computer and select Properties
Select the Advanced tab
Under Performance choose the Settings button
Select the Advanced tab again and under Virtual Memory select Change
Highlight the drive containing your page file and make the initial Size of the file the same as the Maximum Size of the file.
Windows XP sizes the page file to about 1.5X the amount of actual physical memory by default. While this is good for systems with smaller amounts of memory (under 512MB) it is unlikely that a typical XP desktop system will ever need 1.5 X 512MB or more of virtual memory. If you have less than 512MB of memory, leave the page file at its default size. If you have 512MB or more, change the ratio to 1:1 page file size to physical memory size.
8. Run BootVis - Improve Boot Times
BootVis will significantly improve boot times
Download and Run
Select Trace
Select Next Boot and Driver Trace
A Trace Repetitions screen will appear, select Ok and Reboot
Upon reboot, BootVis will automatically start, analyze and log your system’s boot process. When it’s done, in the menu go to Trace and select Optimize System
Reboot.
When your machine has rebooted wait until you see the Optimizing System box appear. Be patient and wait for the process to complete
9. Remove the Desktop Picture
Your desktop background consumes a fair amount of memory and can slow the loading time of your system. Removing it will improve performance.
Right click on Desktop and select Properties
Select the Desktop tab
In the Background window select None
Click Ok
10. Remove Fonts for Speed
Fonts, especially TrueType fonts, use quite a bit of system resources. For optimal performance, trim your fonts down to just those that you need to use on a daily basis and fonts that applications may require.
Open Control Panel
Open Fonts folder
Move fonts you don’t need to a temporary directory (e.g. C:\FONTBKUP?) just in case you need or want to bring a few of them back. The more fonts you uninstall, the more system resources you will gain.
11. Eliminate programs that run at start-up
Stopping programs from running at start-up is especially daunting because there is no single place you can go to halt them all. Some run because they're in the Startup folder, others because they're part of logon scripts, others because of Registry settings, and so on. But with a little bit of perseverance, you should be able to keep them from running.
Start by cleaning out your Startup folder. Find it in C:\Documents and Settings\username\Start Menu\Programs\Startup, where username is your Windows logon name. Delete the shortcuts of any programs you don't want to run on start-up. As with any shortcuts, when you delete them, you're deleting only the shortcut, not the program itself. (You can also clear out the start-up items by going to Start > Programs > Startup, then right-clicking items you want to remove.)
Next, clean out your Scheduled Tasks folder. Go to C:\Windows\Tasks, and delete the shortcuts of any programs that you don't want to run automatically on a schedule.
Note: You can bypass all the programs in your Startup folder on an as-needed basis. To stop XP from loading any programs in the Startup folder, hold down the Shift key during bootup. No programs in the Startup folder will run, but the items will still remain there so that they will start up as they would normally the next time you boot.
Using the system configuration utility
Taking the previous steps will stop the obvious programs from running at start-up, but it won't kill them all. The best tool for disabling hidden programs that run on start-up is the System Configuration Utility. To run it, type msconfig at a command prompt, and press Enter. (If that doesn't work, first do a search for msconfig.exe; when you find the file, double-click it.)
To stop a program from running at start-up, go to the Startup tab in this utility, and uncheck the box next to the program. It can sometimes be difficult to understand what programs are listed on the Startup tab. Some, such as America Online, are clearly labeled. But often, you'll see a phrase or collection of letters, such as fs20. That's the name of the running file--such as fs20.exe, which is Free Surfer mk II, an excellent free pop-up killer.
To get more information about a listing, expand the width of the Command column near the top of the Startup tab. Expand it enough and you'll see the start-up command that the program issues, including its location, such as C:\Program Files\Free Surfer\fs20.exe. The directory location should be another hint to help you know the name of the program.
When stopping programs from running at start-up, it's best to stop them one at a time rather than in groups. You want to make sure that you're not causing any system problems by stopping them. So stop one, then restart your PC. If it runs fine, then stop another and restart. Continue doing this until you've cleared all the programs you don't want to run automatically.
Each time you uncheck a box and restart your PC, you'll get a warning that you've used the System Configuration Utility to disable a program from starting automatically. If you don't want to see that warning, disable it by checking the box in the dialog itself.
After you've used the system configuration utility to identify programs that run on start-up, you may want to try disabling them from with the programs themselves. So run each program that starts automatically, and see if you can find a setting that allows you to prevent it from running on start-up.
12. Speed up shutdown
It's not only start-up that you'd like to speed up; you can also make sure that your system shuts down faster. If shutting down XP takes what seems to be an inordinate amount of time, here are a couple of steps you can take to speed up the shutdown process:
Don't have XP clear your paging file at shutdown. For security reasons, you can have XP clear your paging file (pagefile.sys) of its contents whenever you shut down. Your paging file is used to store temporary files and data, but when your system shuts down, information stays in the file. Some people prefer to have the paging file cleared at shutdown because sensitive information such as unencrypted passwords sometimes ends up in the file. However, clearing the paging file can slow shutdown times significantly, so if extreme security isn't a high priority, you might not want to clear it. To shut down XP without clearing your paging file, run the Registry Editor (click Start > Run, then type regedit in the Run box) and go to:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Cont