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I would suggest you to perform clean boot and remove the program that is causing the issue.
How to configure Windows XP to start in a "clean boot" state
Note: After troubleshooting, make sure to put the computer to start as usual as mentioned here:
To configure Windows to use a Normal startup state
After you used the clean boot to resolve your problem, you can follow these steps to configure Windows XP to start normally.
a. Click Start, and then click Run.
b. Type msconfig, and then click OK. The System Configuration Utility dialog box is displayed.
c. Click the General tab, click Normal
Startup - load all device drivers and services, and then clickOK.
d. When you are prompted, click Restart to restart the computer.
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