Motherboards with same serial numbers!!!

Dear,
May 2 users have same serial number for the motherboard?
Thx
hassanayoub85Asked:
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DaveConnect With a Mentor Commented:
Locking software and a licence to an individual PC is an interesting problem. How do you do it so the user can perform reasonable upgrades with out breaking the software yet present rampant piracy is something no one has yet got right.

Lets face Microsoft follows this process:-

http://technet.microsoft.com/en-us/library/bb457054.aspx#EDAA

to check windows is running on the same PC, I bet you aren't going to follow that?

The MAC address is changeable but you can't use two PCs on the same network segment with the same MAC address. So its a pretty good way of stopping users pirate software round an organization. Not fool proof, but pretty good.  Most everything is changable, so on IBM PC's you can change the serial number with a BIOS utility as per:-

http://forums.windrivers.com/archive/index.php/t-1503.html

If you are going to support old CPU's the the ID can be masked.

If some one really wants to steal your software then they can create a custom hacked virtual machine that reflects the real machine you want to clone. These days there are OpenSource machines dedicated to forensic computing that will simulate most bits on a real machines.

The only secure way to lock software to an individual PC is to use some kind of dongle. I guess that if the software is expensive the this type of tool

http://www.saelig.com/product/U033.htm

with a serial number is the secure choice.
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Raymond PengSystems EngineerCommented:
I highly doubt that's possible since that's what's used during the RMA process.  The Serial number is usually located on the side of one of the motherboard slots.
To answer your question - Yes, it's unique and no they can not be the same

What exactly are you trying to do?
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Michael DyerSenior Systems Support AnalystCommented:
It is possible that they are looking at a part number instead of a serial number - those could be the same.
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hassanayoub85Author Commented:
2 different answers, still confused.
What I am trying to do is a security for my software, I want to make a unique identifier for users to generate keys based on it.
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DaveCommented:
use the network card mac address. these are unique. serial numbers are not gaurenteed to be unique. On ibm/lenovo the are soft so they may be preserved when one is replaced. sometimes they get left as 0. in any case the numbers are only unique per model so two pcs of different models will often have the same number.

If you are coding on windows you can use guidgen to create a unique serial...

http://msdn.microsoft.com/en-us/library/kw069h38.aspx
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hassanayoub85Author Commented:
Cannot using MAC, as MAC is changeable!!!
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CallandorConnect With a Mentor Commented:
You may want to try cpu properties such as UniqueId and ProcessorId http://msdn.microsoft.com/en-us/library/aa394373(VS.85).aspx, along with hard drive identifiers http://msdn.microsoft.com/en-us/library/aa394132(VS.85).aspx.  But you'll have to provide for the possibility that the user may upgrade their equipment.
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