If you have forgotten your Windows XP password, don't worry, there are ways to unlock your computer and regain access to your files and data. Here are a few methods you can try:

1. Use the Windows XP installation disc to reset the password: Boot your computer from the installation disc, choose the 'Repair your computer' option, and then select 'Command Prompt'. Enter the command to replace the sethc.exe file with cmd.exe, restart the computer, and then press the Shift key five times to open a Command Prompt window where you can reset the password.
2. Use a password reset disk: If you had previously created a password reset disk, you can use it to reset your password. Insert the disk into your computer, follow the instructions, and reset your password.
3. Use password recovery software: There are third-party tools available that can help you recover or reset your Windows XP password. You can download and use these tools to regain access to your computer.

Keep in mind that some methods may require technical knowledge and may have certain risks involved. It's always a good idea to back up your data regularly and create a password reset disk to avoid such situations in the future.