Windows 7 continually needing to re-authenticate?

Discussion in 'Windows, Linux & Others on the Mac' started by lazerbrains, Oct 12, 2011.

  1. lazerbrains macrumors regular


    Sep 22, 2011
    I have a partition on my 15 inch Macbook Pro 2.53 GHz. I have Windows 7 installed in BootCamp. (And yes this is a legally owned, and licensed version of Windows 7 Home Premium) I use VMware fusion 3 to access the bootcamp partition from within OSX (Snow Leopard).

    But about a month or two into using it this way, Genuine Advantage pops up and tells me the copy of Windows 7 I am running is not authentic. I then try to authenticate, and it won't let me. I finally have to call Microsoft and have them work through it with me over the phone, and they manually reauthenticate it from their end.

    Then again, it works for a month or two, and then I have to do it all over again. What's up with this. Is there anyway to stop it from happening? I used to run XP this way all the time and it never did this. Is there some thing I can do to make this stop happening?

    Please help, this is very frustrating and time consuming.
  2. ibuyufo macrumors 6502

    Sep 22, 2007
    This happens from you using the bootcamp partition to load into a virtual machine. I'm guessing windows detect the VM as another computer and asks for another key to activate. The same thing happens with parallels. I haven't really looked for an answer because I seldom use windows here and if I do need it I use my desktop running windows 7. Sorry it's not help but it tells you why it happens.
  3. freaknout macrumors newbie

    Sep 8, 2011
    I am thinking along the lines of ibuyufo.

    Do you change hardware settings in VMware every now and then? The amount of ram or processors, etc, because a change in settings could make it think that it's another PC.

  4. lazerbrains thread starter macrumors regular


    Sep 22, 2011
    Yes I have changed the processor and RAM settings from time to time. Thank you both for the helpful insight.

    So this means that if you are running Windows 7, you have to choose between a BootCamp installation, OR a Virtual Machine. BUt probably shouldn't do both? That's a bummer. My old XP install was really nice to be able to either or. Bu t I can understand why this would happen. Thanks for the insight.

    If anyone else knows anything more, or can confirm what has been stated here, please let me know.
  5. johnhurley macrumors 6502a


    Aug 29, 2011
    AFAIK win 7 should handle multiple activations ( the bootcamp one and a vm one ). When you change the memory though for a vm it sees it as different hardware and because the hardware profile changed want to re-activate again.
  6. lazerbrains thread starter macrumors regular


    Sep 22, 2011
    OK. SO will try the boo camp and VM method together without changing the memory settings, and see what happens. I will report back my findings.

    If anyone else has any further insight, feel free to keep posting.

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