Will Free Windows 10 "Upgrade" work with Clean Install (CMPXCHG16b)?

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  1. Posts : 34
    Windows Technical Preview x64, build 10041
    Thread Starter
       #11

    Roger said:
    I'm getting old.............. too old to keep trying to decipher confusing posts in a help forum!
    But I have a plan!
    I'm presently running Win8.1.1, on this machine, and I also have Win10TPx32 running on a second machine. A third machine runs Win10TPx64.
    The machines running Win10TP were previously running Win7, one 32bit and one 64bit..............
    which means that I have two Win7 licenses.
    I'm planning to continue "upgrading" the Win10 machines until the "final" is released and then I plan to "swap" my two Win7 licenses for two Win10 licenses, one 32bit and one 64bit.
    Hopefully the media I need will be downloadable from MS and I will, of course, need to download both the 32bit and 64bit versions.
    I will install both versions, clean install, from DVD, and then register them, either with the two numbers I have for Win7, or with numbers issued by MS as the free "upgrade" from Win7. I'm assuming that if my two license numbers are used to license Win10 they will become invalid for another install of Win7. If new licenses are issued for Win10 I'm assuming that to get the new licenses you will be required to surrender your Win7 licenses.
    I'm sure MS won't allow me to run two new versions of Win10 and keep running my two versions of Win7, for free!
    MS also said I can do this "swap" for free if I do it within one year from release date. If I wait too long and want Win10...... I have to pay for it.
    I would also assume that after the one year free "swap period" expires MS will offer an upgrade version and a "full" version, priced appropriately, so the world doesn't end!

    That's my plan... please don't tell me it won't work???
    Roger, I'm not sure if your remarks were about my posts in particular, but what is so confusing about the difference between an in-place upgrade, and a clean installation?

    My CPU will not permit the in-place upgrade from Windows 7 x64 to Windows 10 x64, but it *will* permit, and run Windows 10 with a clean install (which entails a full wipe/format of disk & partitions).

    My question is simply this: Will I still be able to get Windows 10 x64 free, as an "upgrade", if I do a clean install, and somehow apply my Windows 7 x64 retail Product Key towards this "free upgrade" policy from Microsoft?
    Last edited by Trev0r09; 07 Mar 2015 at 16:29.
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  2. Posts : 194
    Win10
       #12

    Upgrade vs clean install


    If you are running Win10TP you update from MS Update. Click the button and MS makes changes!
    A clean install means you ain't runnin nuttin!
    You need media (ISO) for a clean install.
    An upgrade is handled through MS, MS Updates or Windows Store.
    No DVD or flash drive involved.
    I hope I've made it clear but since Win10 started semantics seems to cause a lot of problems.
    Come back if my explanation isn't clear and I'll try again.
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  3. Posts : 194
    Win10
       #13

    Hungup on upgrade!


    "My question is simply this: Will I still be able to get Windows 10 x64 free, as an "upgrade", if I do a clean install, and somehow apply my Windows 7 x64 retail Product Key towards this "free upgrade" policy from Microsoft? "

    I think maybe you're hungup on "upgrade"..................

    Moving from Win7 to Win10 is an upgrade, sure, but you upgrade by swapping Win7 license for Win10 license.
    You don't upgrade your present OS to Win10 by making changes to your presently installed OS.
    You'll need to download an ISO for Win10, burn it to DVD, and do a "clean install". USB media also works!
    Your Win7 retail Product Key will be necessary to register Win10............. how I don't know yet.
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  4. Posts : 1,778
    Windows 10 Pro,
       #14

    Roger said:
    I'm getting old.............. too old to keep trying to decipher confusing posts in a help forum!
    But I have a plan!
    I'm presently running Win8.1.1, on this machine, and I also have Win10TPx32 running on a second machine. A third machine runs Win10TPx64.
    The machines running Win10TP were previously running Win7, one 32bit and one 64bit..............
    which means that I have two Win7 licenses.
    I'm planning to continue "upgrading" the Win10 machines until the "final" is released and then I plan to "swap" my two Win7 licenses for two Win10 licenses, one 32bit and one 64bit.
    Hopefully the media I need will be downloadable from MS and I will, of course, need to download both the 32bit and 64bit versions.
    I will install both versions, clean install, from DVD, and then register them, either with the two numbers I have for Win7, or with numbers issued by MS as the free "upgrade" from Win7. I'm assuming that if my two license numbers are used to license Win10 they will become invalid for another install of Win7. If new licenses are issued for Win10 I'm assuming that to get the new licenses you will be required to surrender your Win7 licenses.
    I'm sure MS won't allow me to run two new versions of Win10 and keep running my two versions of Win7, for free!
    MS also said I can do this "swap" for free if I do it within one year from release date. If I wait too long and want Win10...... I have to pay for it.
    I would also assume that after the one year free "swap period" expires MS will offer an upgrade version and a "full" version, priced appropriately, so the world doesn't end!

    That's my plan... please don't tell me it won't work???


    Your plan sounds very feasible.
      My Computer


  5. Posts : 3,257
    Windows 10 Pro
       #15

    According to this:

    https://technet.microsoft.com/en-us/.../dn798752.aspx

    For 64-bit installations of Windows 10 Enterprise Technical Preview, a small number of older PCs may be blocked from installing the preview because they don't support CMPXCHG16b, PrefetchW, and LAHF/SAHF.
    Also, according to this article, a Microsoft spokesperson has confirmed that support for these processors was deliberately removed for security reasons.

    http://www.guru3d.com/news-story/som...ndows-8-1.html

    We contacted Microsoft for comment and received a response from a spokesperson. The statement confirms the removal of Windows 8.1 support for these AMD chips, adding: This was a change done to improve the security effectiveness of Windows by removing code that cannot use instructions such as CMPXCHG16b. Based on our data, the number of affected processors are extremely small, since this instruction has been supported for greater than 10 years.
    Maybe you should just upgrade to a CPU that supports the instructions.
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  6. Posts : 194
    Win10
       #16

    Confusion zone again....


    I'm back in the confusion zone again.............
    Enterprise is a different breed of cat???

    He has full retail version of Win7???
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  7. Posts : 1,524
    Windows 10 Pro (32-bit) 16299.15
       #17

    Trev0r09 said:
    My CPU will not permit the in-place upgrade from Windows 7 x64 to Windows 10 x64, but it *will* permit, and run Windows 10 with a clean install (which entails a full wipe/format of disk & partitions).
    If this is true, it may be that this behaviour in the Preview is unintentional and Microsoft might 'fix' this for the final version -in a way which doesn't support your CPU in 64-bit. If so, the issue of whether you can download a clean install becomes less relevant.

    Trev0r09 said:
    My question is simply this: Will I still be able to get Windows 10 x64 free, as an "upgrade", if I do a clean install, and somehow apply my Windows 7 x64 retail Product Key towards this "free upgrade" policy from Microsoft?
    I don't think we know enough about how Microsoft are planning to do the free upgrades. For instance they may allow you to claim a new Product Key (they did something like this for Windows 8 Media Center) which you could then use to download an ISO. They also have the Windows 8.1 Media Creation tool these days which lets users of some (but not all) windows 8.1 versions download an ISO for reinstallation/repair. So I'm hopeful we'll be able to et ISOs to do clean installs. But we don't really know enough yet.
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  8. Posts : 3,257
    Windows 10 Pro
       #18

    Roger said:
    I'm back in the confusion zone again.............
    Enterprise is a different breed of cat???

    He has full retail version of Win7???
    I would be very surprised if this was any different for any other version of Windows. They only specify Enterprise there because that's the version that is the download page for that version.
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  9. Posts : 34
    Windows Technical Preview x64, build 10041
    Thread Starter
       #19

    Roger said:
    I'm back in the confusion zone again.............
    Enterprise is a different breed of cat???

    He has full retail version of Win7???

    Yes, I have the full retail version of Windows 7 (Home Premium 64-bit). What's so incredibly earth-shattering about that?
    Last edited by Trev0r09; 08 Mar 2015 at 10:56.
      My Computer


  10. Posts : 194
    Win10
       #20

    Retail vs Enterprise


    Nothing earth-shattering but there is a great deal of difference between the two versions.
    You purchased the retail version and that's a smart move in my mind.
    With the Retail version you get a Product Key to register your install.
    Buy a new computer and you can move your Retail version to the new computer and re-register it. Not true with other versions or editions of Windows.

    That's the simple explanation! I would suggest that you research Windows Editions or Windows Versions to get a fuller understanding. There are only about 55 million hits on those subjects so maybe that could be called earth-shattering!

    I don't buy into the idea that you won't be able to do a clean install of Win10 on your machine. The machine runs Win8 so I'm confident that it will run Win10 with a "clean install" of the appropriate ISO from a DVD or a USB drive.
    The registration of the free Win10 requires that you own a copy or Win7 or Win8 and are willing to swap your system for the new one. Details to follow!
    I don't think MS has released anything in that regard yet??

    If you are a new user as intimated above I would recommend that you make Google your BFF. Google has the answers to your questions with the greatest challenge being how to frame your question.
    Enterprise vs Home vs Pro?
    Windows versions
    Windows editions
    These all produce an abundance of information.
    Wikipedia also answers these questions...........
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