How does Horizon ID my computer?

[tubby]

I purchased and installed Rollback Rx on a new (only 3-weeks old Dell PC)

Due to a minor hardware issue, Dell is coming to my home next week to replace the entire mother board! (I guess that's how they fix even minor hardware issues)

If/when I need to re-install Rollback Rx in the future with my current "license key" I wonder if there will be problems because of the new mother board. I know Horizon will help me but I am curious.

1) Does Horizon ID my computer by looking at the harddrive or by looking at the motherboard?

2) I "chatted" with Horizon Customer Service and they were not certain but they "thought" Horizon looked only at the harddrive but then I thought with all the imaging/cloning that goes on, it would be in Horizons best intrest to ID a computer by the mother board not the harddrive.

Any thoughts?

-tubby