HP
TRANSACTION ID is required

I, WASIM AHMED MULLICK, purchased a HP Pavilion Dv-4 1318TU notebook on 24 day of september from E-MALL, kolkata. The case memo no is T8/3158.The serial no of the notebook is CND9324FSC.The TRANSACTION ID is required for upgrading my operating system to WINDOWS 7 but i cannot find this. I don't know what is TRANSACTION ID.I am sure that the case memo no is not TRANSACTION ID.Please tell me in details where fom i get the TRANSACTION ID. Please inform me as early as possible.

Company: HP
Country: India

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