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Possible Duplicate:
Where do I download Windows 7 (legally from Microsoft)?
Windows Vista/7 Activation FAQ: How do language, version, 64-bit or 32-bit, and source affect ability to install and transfer Windows licenses?

I've got an Asus Eee PC 1215n. The CPU is an Intel Atom D525 (a 64-bit processor with two cores in hyper-threading). It is distributed with Windows 7 Home Premium (32 bit edition).

I upgraded it installing 4 GB of RAM, and I would like to take the best from it installing a 64 bit OS.

I want to have a 100% clean and legal system, without cracked software on it, including the O.S.

If I can acquire the install media for the 64-bit version, may I upgrade to 64 bit using the same serial number on the sticker stuck to the laptop?

I am trying to acquire the media legally, should I contact Asus or Microsoft?

share|improve this question

marked as duplicate by Ƭᴇcʜιᴇ007, Sathya Feb 4 '12 at 18:47

This question was marked as an exact duplicate of an existing question.

techie007, thanks for the edit. Still, I would like to know HOW can I acquire that media, legally. Would you mind editing again restoring the original meaning? – gd1 Feb 4 '12 at 18:41
ok I'll read that topic :) – gd1 Feb 4 '12 at 18:43
See the dupe regarding "if you can use the key you have with a different version/media". To get "legit" media you should contact Microsoft and see what your options are. Generally if you have a legit key, you can use any valid install media, regardless of how you acquired it. – Ƭᴇcʜιᴇ007 Feb 4 '12 at 18:44
I love these questions, because the answer tends to boil down to "open up your wallet." – surfasb Feb 5 '12 at 2:21
@surfasb: yeah, but fortunately not in this case – gd1 Feb 5 '12 at 6:39