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I've been asked to update some computers running Windows XP (without any service packs) to Windows XP SP3. The computers don't have an internet connection (only a small intranet) and have never been updated since first install.

Do I need to install SP1a first, then SP2, then SP3, or can I install SP3 immediately?

And where do I find the right files, that don't require an internet connection during installation?

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    1) I recently answered a question from someone who needed to install SP2 before he could install SP3. I guess you need all three of them. 2) Check out download.wsusoffline.net for offline updating. 3) I hope USB ports and CDROM drives are disabled on those systems, or at the very last that the antivirus software is regularly updated. If not add that to the TODO-list
    – Hennes
    Oct 9, 2012 at 8:47
  • Thanks. I have downloaded the service packs and also the WSUS software. I'll try the WSUS one first. I compiled the package and put it on an usb-drive. If it doesn't work for some reason, I'll still have the service packs. Your third point is exactly why these systems need to be updated.
    – Alexander
    Oct 9, 2012 at 10:39

2 Answers 2

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Here are links to offline installation files for SP1a, SP2 and SP3. Download them on system with an internet connection and use them to update any systems with no internet connection.

If you want to create only single installation disk of all the previous updates including SP3, go to this link to download an ISO image.

Also, you can refer this post.

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  • Thanks for the links. I'll burn the ISO onto a CD and will have the separate packs with me on a usb-drive when I go there. (As well as the WSUS package @Hennes mentioned.)
    – Alexander
    Oct 9, 2012 at 10:41
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    Except for the SP1a, the rest of the links as of today are broken.
    – Fabián
    Jan 4, 2017 at 23:52
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You might also make a slipstream install CD, which has SP3 integrated into the install CD. Of course, it is only helpful if you can install from scratch, and not upgrade existing systems where you need to retain installed programs and settings.

Here's a guide: http://winsupersite.com/article/windows-xp2/slipstreaming-windows-xp-with-service-pack-3-sp3-128464

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