Windows 10: disabling dwm access denied

Discus and support disabling dwm access denied in Windows 10 Performance & Maintenance to solve the problem; I created another post since my first got unasnwered 20 days and editing doesn't bring up my question. I am trying to terminate dwm on windows 10, i... Discussion in 'Windows 10 Performance & Maintenance' started by empleat, May 12, 2019.

  1. empleat Win User

    disabling dwm access denied

    I created another post since my first got unasnwered 20 days and editing doesn't bring up my question.
    I am trying to terminate dwm on windows 10, i found this guide dwm - Temporarily disable Desktop Composition in Windows 10? - Super User
    After i suspend explorer.exe i try to terminate dwm and it says access denied, even i added my admin account as owner and full control. It is important to disable this process cause huge input lag! And it should be possible, don't know why this doesnt work.

    empleat, May 12, 2019
  2. Yolvi Ell Win User

    net user administrator /active:no keeps saying access denied.

    Hi Rebekah,

    It's possible that you're not using an elevated command prompt, causing the Access Denied error. We suggest following these steps to properly disable the built-in administrator account:

    • Right-click the Start button.
    • Choose Command Prompt (Admin).
    • Copy and paste net user Administrator /active:no and press
      . If the command isn't successful, please post a screenshot so that we can study it further.

    Let us know if you're able to hide the administrator account after following these steps.
    Yolvi Ell, May 12, 2019
  3. Get better Game Performance under Vista by disabling DWM on a per-application basis!

    I just came across this tip/tweak, which probably many who are familiar with Vista already know... It's about disabling the aero effect on a per-application basis, so that you get vista basic interface during gameplay (when you're not going to see it) and it switches back to aero when you exit the game.

    DWM, or the Desktop Window Manager, turns the graphics card into a shared resource which allows for the Aeroglass effects and the tear-free desktop. When running normal applications, this is a good thing because it offloads the graphics work (the bulk of which was handled by the CPU in Windows XP) to the GPU, which, when running normal applications is sitting in your computer doing nothing. With Aeroglass/DWM on, the CPU is freed up for other duties as all of the desktop graphics are now handled by the GPU.

    In DirectX 9 and OpenGL games however, having Aeroglass/DWM on can decrease performance. This is for a number of reasons :
    1.DWM makes the video card a shared resource. When DWM is on, programs are not allowed direct access to the video card.
    2.DWM uses both System RAM and VRAM because it maintains an offscreen buffer for every window.

    Fortunately, Microsoft has provided a way to disable DWM on a per-application basis so you can still enjoy Aeroglass when not running games. To disable DWM on a per-application basis, right click on the application/game's icon and select properties. Navigate to the compatibility tab, then find and check Disable Desktop Compositing. Now, whenever you launch that program, Windows Vista will temporarily switch back to the Windows XP style graphics subsystem.

    DirectX 10 games shouldn't be affected as much (if at all) by having DWM on because the DirectX 10 API is designed around having the GPU as a shared resource and is better able to handle GPU multitasking.

    With a few simple steps, on most setups, you can easily make your games run as fast or faster than in Windows XP under Windows Vista.

    This will work on both the 32-bit and 64-bit versions of Windows Vista.
    Black Panther, May 12, 2019
  4. EsMj Win User

    disabling dwm access denied

    Change Folder Destination access Denied


    After following the steps suggested, I get the message "Access denied" in command prompt.

    Please advise how to allow permission.

disabling dwm access denied

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