As I said ealier, it could be your security software and startup entries slowing this machine
Your option to leave what you have installed or try alternatives
Anyways, you could still try the following
See if it makes any difference
Have your Windows XP CD ready, in case your asked for it
Go to START>>RUN>>Type in
sfc /scannowNote the single space after sfc
Hit Enter, this will check your system for corrupt/missing files
When it's done reboot the computer
Back in Windows: download and save to desktop
Dial-A-Fix from the following location
[color="#0000FF"]Click HERE[/color]After you have it saved to desktop, Extract the folder within to your desktop
Open the Dial-A-Fix folder and double click on DialaFix.exe icon
Don't worry if you get an "Unable to determine your version of IE....." message, and it goes on asking to email them, just ignore it
and click OK
Click on the TOOLS (the hammer icon) on the bottom, then highlight "Flush DNS"
Hit GO>>OK the prompt
Then select "Repair Permissions" and hit GO
Verify running secedit.exe>>you may be prompted twice
When done, click the CLOSE button once on bottom right
Select the [color="#00FF00"]
GREEN[/color] check, this will select all options
Then hit the
GOVerify that your Date/time is correct, click OK to continue
You will eventually get to the point of it Registering >> Explorer/IE/OE/Shell/WMP
and more than likely get about 12 error messages as eg...
"Error 127, etc, etc,etc....."
Again, ignore those error messages by click OK
When Dial-A-Fix is complete, click
EXITOpen MyComputer and right click on your C: drive
Select Properties>>TOOLS>>"Check Now" under 'Error Checking'
Select both options then click START
You should be prompted to schedule to run on startup, OK this and reboot your computer
Error checking should start on startup, this can take awhile, let it finish
Back in Windows
You can run error checking on your other drives in MyComputer, you won't be prompted to run on startup
When done, run Disk Defragmenter tool on your drives
Located in START>>All Programs>>Accessories>>System tools>>Disk Defragmenter
When done, reboot one last time
See if that is any help