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Is there an official source for Windows ISO (XP+) checksums, online?

Wanting to download some older Windows versions, for support purposes, but they don't appear to be available on Microsoft's website, so I am having to find 3rd party copies.

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@Ramhound - Thanks. I don't have a MSDN subscription, and had a decent look for this online before posting. Have (a) link(S) for any/all of these on Technet? –  user66001 Oct 19 '13 at 7:49
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up vote 6 down vote accepted

An MSDN subscription is not needed to browse the contents on the Subscriber Downloads page.

Once there, you can browse to any product and click on the Details link to see the SHA1 hash for the product

for ex.: Windows XP Service Pack 3 (x86) - CD (English)

Windows XP Service Pack 3 (x86) - CD (English)
SHA1: 8fa76ccea145d050fc6a506ffbdedfe53282e5b4

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Thanks for the link Tulhan. Went back to google with "Windows XP SHA1" search, and it still didn't come up in the first few pages. Finding info on Microsoft websites (by proxy, through search engines like Google) seems to be a constant challenge for me. Black box it is. –  user66001 Oct 19 '13 at 16:32
    
@user66001 I have absolutely no issues finding the hashes for any product. Added screenshots to the post if it is of any help. –  Tulhan Oct 19 '13 at 17:32
    
Sorry, I should have probably worded my last comment better. Your answer is correct, hence marked as such. Was just commenting that this is the reason for the question, given my difficulty (in general) with finding official info on MS's websites. It was also partly to address Ramhound's comment that seemed to suggest it was an easy answer (Now deleted, it seems). P.S I actually liked the previous version of your answer :) –  user66001 Oct 19 '13 at 17:38
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@user66001 Ah! okay. Glad to be of help. Rolled back to previous version. ;) –  Tulhan Oct 19 '13 at 17:41
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I use Google's site operator. For your question, i used the query windows xp sha1 site:microsoft.com, which led me to an MSDN help article that gave me the answer. –  Tulhan Oct 19 '13 at 17:50
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