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I have a non-booting system with Windows XP, I have access to the system partition (by booting with Ubuntu, or even by mounting the HDD in a working Windows machine).

How can I tell, by analyzing the system partition, if the installed SKU of Windows XP is home or professional?

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up vote 5 down vote accepted

Go to the Windows\System32 folder, and look for EULA.txt. Scroll to the last line, and it will tell you what media and what version was originally installed

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"I have a non-booting system ..." – William Jackson Jul 21 '11 at 17:09
I read that after... So I edited my respone – Canadian Luke Jul 21 '11 at 17:10
Thanks, that's exactly the kind of answer I needed :) – Wizard79 Jul 21 '11 at 17:14

Use a tool such as Magical Jelly Bean KeyFinder to load the registry from the disk while connected to another windows PC. Use the Tools --> Load Hive... function to switch to the external disk.

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It doesn't work... it says "Microsoft Windows XP Service Pack 3 / Product Part No.: A22-00001 / Installed from 'OEM' media" followed by the product key. No mention of Home or Professional... – Wizard79 Jul 21 '11 at 17:05
Hmm, odd - could've sworn it also showed the edition for XP (it certainly does for Vista / 7) ... Apologies for the red-herring :( – Mike Insch Jul 21 '11 at 17:21

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