Please, I need your help, I downgrade to XP SP3, and the migration was succesfully, but, when i want to start the fingerprint software it show this error: "El sensor conectado no se inició con esta alicación. Acceso Denegado" maybe "The sensor connected don't start with the correct aplication. Deny Access".
This should do it. The reason you were having problems before was that you enrolled your fingerprints using Vista and not XP, so the fingerprint data at the BIOS level didn't recognize the fingerprints anymore.
Let me know if this fixes your issue.
Buena suerte amigo,
Do NOT PM me with technical issues. Post in the forum for assistance. Thanks