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  1.    25 Feb 2016 #31
    Join Date : Aug 2015
    Posts : 96
    Microsoft Windows 10 Pro 64-bit 10586 Multiprocessor Free
    Thread Starter

    MEI does show up.
    It happened during the saga of trying to figure out the USB3.0 issue on system wakeup.
    So I got to a point where I couldn't install the drivers and more or even removing them. As if Windows just sped up the install process without copying and registering the files.

    I was able to restore to a previous point but not far enough to the point where I don't have the Legacy Device....
      My ComputerSystem Spec
  2.    25 Feb 2016 #32
    Join Date : Aug 2015
    Posts : 611
    W10 Home 1709

    You can uninstall MEI then.

    Curious why you are concerned about the Legacy Device. Is there a particular reason why you think it should not be there? There are lots of necessary legacy devices needed for backward compatibility.
      My ComputerSystem Spec
  3.    25 Feb 2016 #33
    Join Date : Aug 2015
    Posts : 96
    Microsoft Windows 10 Pro 64-bit 10586 Multiprocessor Free
    Thread Starter

    Good question....

    I recall 3 days ago whilst messaging with you, that you told me that it's better to install the old verified WHQL signed drivers for the chipset and USB 3.0.
    When I decided to try the Beta USB or Chipset driver for Win10 by Asus, there was a legacy device which wasn't working properly. It had the yellow triangle warning in Device Manager > System Devices.
    I then manually installed some driver and it got accepted by Windows and then changed name from Legacy Device to some Root USB hub or something.
    Now I'm not able to repeat this step...

    As for the USB 3 not working as USB 3 anymore after wake up, I think it's a bug in the motherboard when waking up.
    But, if I use hibernate (just because I love fast booting), it works as USB 3. I wonder if it has something to do with C states in BIOS settings.
    I currently only have C3 enabled.
      My ComputerSystem Spec
  4.    25 Feb 2016 #34
    Join Date : Aug 2015
    Posts : 611
    W10 Home 1709

    No, it wouldn't have anything to do with C states, IMHO.

    But you could try this:
    • Check and record ALL of your current UEFI/BIOS settings
    • Check (usually under the Advanced Tab) for your USB settings. Note what you have here in particular.
    • Then go to the Exit Tab and Restore Defaults > Save Changes and Exit
    • Immediately go back into UEFI/BIOS and compare the default settings to what you had.
    • Restore any settings YOU ARE SURE you need (Like SATA Mode = AHCI if Windows was installed in AHCI Mode and your BIOS defaults to IDE).
    • Exit Saving Changes (if you made any) and then let it boot into Windows
    • Test the USB problem while on BIOS Defaults


    See if that changes anything for the better.
      My ComputerSystem Spec

 
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