Hi,
As it is Windows 7 OEM version, it is always suggest to contact HP for direct assistance.
Based on the error, there are two possibilities:
1. The disk is damaged. Inspect them for scratches and fingerprints. If scratched purchase a CD polishing kit similar to this one:
http://www.gizoo.co.uk/Products/HomeGarden/Home/CDRepair.htm Note: The third-party product discussed here is manufactured by a company that is independent of Microsoft. We make no warranty,
implied or otherwise, regarding this product's performance or reliability.
2. The DVD drive in the PC is not working properly.
Your understanding is greatly appreciated.
Regards,
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