That's not really an error message, it's just an information that something has changed in your hardware. Now, whether YOU manually changed hardware, or some of your drivers has a bug and decided to report to Windows an hardware change, which in turns reports to Esellerate the hardware change, which in turns reports to the Addon Manager the same, doesn't change much, it's still seen as an hardware change.
We don't do any hardware detection ourselves, we rely on Esellerate, which in turns relies on your Windows drivers at the lowest level. It's possible that something related to overclocking might cause this, but it only happens in very rare circumstances with specific combinations of driver/mainboard/cpu and overclocking methods.
Is not really a problem, you will simply have to confirm the activation because, even if you got that message, it might still not count as a MAJOR hardware change, consuming one of your activations.
