Thank you for posting your query in Microsoft Community.
Based on the information you have provided, I understand Windows XP freezes during startup.
I can imagine the inconvenience you have experienced. I will certainly help you with this issue.
1. Are you getting any error message?
2. Were there any changes made to the computer prior to the issue?
Please follow the steps from the link.
Advanced troubleshooting for general startup problems in Windows XP
For any help related to Windows you may always post on the Microsoft Community Forum.
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