Prefetchw

Discussion in 'Windows 8' started by bhupeshgajria, Sep 1, 2013.

  1. bhupeshgajria

    bhupeshgajria MDL Novice

    May 10, 2007
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    While trying to upgrade from Windows 8(x64) to 8.1 (x64)... (not booting through USB/DVD) - I get the error message
    "You can't install Windows 8.1 because your processor doesn't support PrefetchW"

    I have Pentium Core 2 Duo 2.8Ghz...

    On many sites I read Windows 8.1 should run anyways..... Any idea why wont it install.
     
  2. okatomy

    okatomy MDL Novice

    Aug 14, 2009
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    such doesnt exist.
    Please tell us the exact name of the CPU
     
  3. Tito

    Tito Super Mod / Adviser
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    Nov 30, 2009
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    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  4. bhupeshgajria

    bhupeshgajria MDL Novice

    May 10, 2007
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    Windows 8 64 bit works fine .... so 8.1 has a different requirement altogether....?

    I mean Intel Core 2 Duo
     
  5. softeac2

    softeac2 MDL Member

    Aug 23, 2013
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    Real key for installing windows 8.1 ?
     
  6. Neyder

    Neyder MDL Novice

    Oct 28, 2012
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    #6 Neyder, Sep 2, 2013
    Last edited: Sep 2, 2013
    Core 2 Duo what ? E4xxx ? E6xxx ? E8xxx ? Desktop ? Mobile ? there are dozens of C2D :rolleyes:

    Have your read wikipedia article ?
    So no, it's not the same for x64
     
  7. kornykova

    kornykova MDL Novice

    Jun 20, 2010
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    I get exactly the same problem!

    Went to upgrade to 8.1 today (I have Windows 8 Pro with Media Centre) and the Upgrade Assistant said I couldn't as my processor (Pentium D 820 2.8GHz) doesn't support PrefetchW.
    I downloaded MS's CoreInfo tool and it says it DOES support PrefetchW (and PAE, NX, SSE2, LAHF, SAHF, CMPXCHG16B too!).
    So, according to CoreInfo my Pentium should support 8.1 but the Upgrade Assistant disagrees.
    I checked my BIOS too and "Execute Disable Memory Protection Technology" (Dell BIOS A05) IS enabled!

    Any thoughts on what I can do to get upgraded to 8.1?

    Thanks