A customer has an HP Pavilion with Windows 7 that is suddenly reporting that Windows is not genuine. This customer is not sophisticated enough to install an OS other than the one the was delivered with the computer, and I certainly did not make that change. I have scanned the machine with Superantispyware and ESET's online scanner. The system ran clean. I have run the Windows Repair from Tweakings.com and the Microsoft Fix-It. And, I have tried restoring to a point before the problem occurred.
I doubt that the customer has the installation media, and I don't know if HP will supply a Windows 7 disk or a System Restore disk.
I would prefer not to reinstall Windows from scratch. What can I do to get Windows to recognize that it is not counterfeit?