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Ok guys I've just read this page: http://www.irongeek.com/i.php?page=security/changemac

But before I want to attempt anything, I want to ask: Is modifying our MAC Address (in the way provided at that page) a perfectly reversible operation?

plus there's no way anyone can track if you have ever changed your MAC Address?

Btw i'm using 32-bit Windows Vista sp2 Home Premium

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@downvoter explain the downvotes if you can – Pacerier Jun 30 '11 at 11:34
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2 Answers

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With regards to tracking if a MAC has ever been changed you should understand that changing the MAC on a computer doesn't overwrite your current MAC address, merely over-rides it. The network card has a burnt-in MAC address that can't be overwritten, so if you were to reinstall windows after a MAC address change you would go back to the old MAC address,

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up vote 2 down vote

If you can change it, you can change it back yes. I guess its possible to track if you are logged in under a domain account and then you change your MAC address. That could be something that is logged. Other than that though, not really possible.

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