Windows 10: "The CPU isn't supported" error true or not

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  1. Posts : 2
    Windows 7 Home Premium
       02 Nov 2015 #41

    Thanks peterb for helping me get past this! I had reset my bcd and didn't realize it reset NX bit

    peterb said: View Post
    Over in the Microsoft answers thread one guy found a workaround for the nx feature missing, copied post below

    CPU not supported. - Microsoft Community

    Hi guys
    I posted this on technet - but here's a copy/paste from Windows 10 not compatible with an i5 processor?

    I had the same issue, and couldnt find anything in the BIOS to enable the NX bit.
    After lots of research, found I could by using BCDEDIT to turn on NX - it worked!
    Brief guide:
    Start CMD prompt as Administrator
    BCDEDIT enter
    shows you the current entries
    to enable the NX bit always (which is what I did to pass the Windows 10 update check)
    bcdedit /set nx alwayson
    You'll get a "Command completed successfully" - then REBOOT and try to run your update - you can force an immediate update by downloading and running the MediaCreationTool.exe from Windows 10
      My ComputerSystem Spec

  2. spapakons's Avatar
    Posts : 2,483
    Windows 10 Pro 64-bit 1803 (April 2018 build 17134.48)
       03 Nov 2015 #42

    Hello! It is possible to hack some system files (ntoskrnl.exe, winload.exe and some more) and bypass the NX/PAE check so you can install Windows 8 or 8.1 32-bit in an old Pentium 4, or even a Pentium III, but the latter will be too slow to be useful. The same trick works for Windows 10 32-bit, I have tried it, but the problem in Windows 10 is that you get an error message that the digital signature or ntoskrnl.exe is invalid and have to press a key to select the Advanced Startup Options, and then 7 to disable signature enforcement (test mode). This happens AT EVERY restart! No matter what I tried, in order to load Windows 10 I had to select the Advanced Startup Options and disable signature enforcement (test mode) EVERY time. As you can imagine, it is rather annoying. But when in Windows 10, they did work without any perceivable compatibility issue.

    For anyone interested, the process involves to boot with Windows 7 DVD and when at Setup screen press SHIFT+F10 to get a command prompt. Then you use diskpart to wipe the disk clean, create a primary partition and format to NTFS. Next you use the imagex.exe utility to extract the Windows 10 Setup files from install.wim to the hard disk. This is like starting the Windows Setup and getting to the point of the first restart. Before you do anything else, you use a utility to patch the relevant system files to bypass NX/PAE checks and also enable both CPU threads in hyperthreading. Having patched the system files, you restart the computer from the hard disk, NX/PAE tests are bypassed so Setup resumes and goes to the next stage. The problem is that after Setup is complete, every new restart you have to select the Advanced Startup Options and then to disable signature enforcement (test mode). So it is best avoided to install Windows 10. Windows 8 will boot to the desktop without having this issue (just enable test mode permanently) but you may need to re-patch the system files after every Windows Update, if they are replaced.

    My advice: Stay with Windows 7 32-bit to avoid any issues. If you want to do it, at least install Windows 8.1 so you don't get the annoying boot sequence every time. Install Windows 10 at your own risk.

    Read all the details here. You may have to register to read all content.

    PS 1: Warning! If there is no WDDM driver for your graphics card (at least Vista driver), you will be stuck with Microsoft Basic Display Adapter (basic display, NO ACCELERATION). Windows 8 and 10 do not allow installing Windows XP graphics driver (XPDM). So stay with Windows 7 that will accept an XPDM driver. Windows 8 and 10 demand a WDDM driver, or you get basic graphics only. No effects, no games, not even the screensaver will work! Beware!

    PS 2: Hacking the files to upgrade Windows 7 to 10 is far more complicated, almost impossible, so forget it! I did upgrade once from Windows 7 to 8 but I tried too many things to remember exactly what worked.
      My ComputerSystem Spec

  3. Posts : 1
    OSX10.11, windows 7 home, window 10 home
       17 Dec 2015 #43

    AySz88 said: View Post
    There is a DEP setting in Windows that you may need to turn on: Go to Control Panel > System > Advanced system settings > Advanced tab > Performance "Settings..." > Data Execution Prevention tab > choose the second option ("Turn on DEP for all programs and services except those I select"). Hit OK, and restart the computer.

    Weird that the setup program doesn't look at that option to see if it's toggled wrong!

    Installation worked for me when I had DEP enabled in both the BIOS and in Windows.
    I joined this forum to say thank you. So simple and so very silly of Microsoft. I have a Core 2 Duo P8600 CPU in a Lenovo SL500 Lpatop and kept getting NX not present errors despite coreinfo.exe saying all was good.

    thank you again.
      My ComputerSystem Spec

  4. spapakons's Avatar
    Posts : 2,483
    Windows 10 Pro 64-bit 1803 (April 2018 build 17134.48)
       17 Dec 2015 #44

    It is this strange behavior of Windows that can drive an average user crazy about computers... Fortunately we experts become immune after enough exposure to this madness...
      My ComputerSystem Spec

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