Windows 10: Starting with Windows 10 2004 the PFA memory list is no longer recognized

Discus and support Starting with Windows 10 2004 the PFA memory list is no longer recognized in Windows 10 Installation and Upgrade to solve the problem; Starting with Windows 10-2004 the PFA memory list, as described for example here... Discussion in 'Windows 10 Installation and Upgrade' started by Vladimir_PV, Jul 20, 2020.

  1. Starting with Windows 10 2004 the PFA memory list is no longer recognized


    Starting with Windows 10-2004 the PFA memory list, as described for example here https://docs.microsoft.com/en-us/windows-hardware/drivers/whea/how-to-manage-the-pfa-memory-list , is no longer recognized.

    How to test:
    1 Start „regedit.exe“, and export „ Computer\HKEY_LOCAL_MACHINE\HARDWARE\RESOURCEMAP\System Resources” as _text_ to a file A.
    2 Choose a memory address to test the functionality. For example 32MB =0x2000000 page number = 0x2000000 / 0x1000 {page size} = 0x2000.
    3 Now open file A and ensure the chosen address 0x2000000 is part of a descriptor below “Physical Memory”, but neither part of “Loader Reserved” nor “Reserved”. Typically 0x2000000 should be fine.
    4 Open an administrator command prompt and execute these commands to add the memory at 0x2000000 to the bad memory list by adding its page number 0x2000:
    “bcdedit /set {badmemory} badmemorylist 0x2000”
    To ensure Windows does not ignore the list this setting is also required:
    “bcdedit /set {badmemory} badmemoryaccess no”
    To be sure there is no override in the current settings also call:
    “bcdedit /set {current} badmemorylist 0x2000”
    “bcdedit /set {current} badmemoryaccess no”
    The settings can be verified calling:
    “bcdedit /enum {badmemory}”
    “bcdedit /enum {current}”
    5 Reboot the PC
    6 Again start „regedit.exe“, and export „ Computer\HKEY_LOCAL_MACHINE\HARDWARE\RESOURCEMAP\System Resources” as text to another file B.
    7 Compare file A and B.


    Before Windows 10-2004 files A and B were different, because in file B the faulty page was excluded from usable memory, as you can see in the attached files.

    Using Windows 10-2004 the only differences are the timestamps.



    We also succeeded in reserving a memory range containing such a bad memory entry by calling “MmAllocateContiguousMemorySpecifyCache” https://docs.microsoft.com/en-us/windows-hardware/drivers/ddi/wdm/nf-wdm-mmallocatecontiguousmemoryspecifycache.

    :)
     
    Vladimir_PV, Jul 20, 2020
    #1
  2. Nofsdad Win User

    No longer recognizes CD/DVD drive


    Since receiving the Win 10 Home upgrade my computer no longer recognizes the DVD drive. It doesn't show in Device Manger or in the device list in This PC although it does spin up if you insert media into it. I've tried all the suggested remedies except messing with the registry and nothing works. This is one of several problems I've had with device drivers since the upgrade.

    Windows 10 Home 64 bit
    AMD FX-4130 3.80Ghz
    8Gb Installed memory
     
    Nofsdad, Jul 20, 2020
    #2
  3. Ahhzz Win User
    Windows 10 Tweaks

    Pressing “Windows+Pause Break” (it’s up there next to scroll lock) opens the “System” Window.

    Windows 10: In the new version of Windows, Explorer has a section called Quick Access. This includes your frequent folders and recent files. Explorer defaults to opening this page when you open a new window. If you’d rather open the usual This PC, with links to your drives and library folders, follow these steps:

    • Open a new Explorer window.
    • Click View in the ribbon.
    • Click Options.
    • Under General, next to “Open File Explorer to:” choose “This PC.”
    • Click OK


    credit to Lifehacker.
     
    Ahhzz, Jul 20, 2020
    #3
  4. DRDNA Win User

    Starting with Windows 10 2004 the PFA memory list is no longer recognized

    DRDNA, Jul 20, 2020
    #4
Thema:

Starting with Windows 10 2004 the PFA memory list is no longer recognized

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