DirectDraw can not be disabled under win7

DirectDraw is the basic part of DirectX video input and output. DirectDraw can be used to easily produce efficient video processing programs. As long as the user's hardware supports DirectDraw, you can ensure your code can be guaranteed. Process them. So if DirectDraw in Windows 7 can't be disabled, how can I fix it?
Users familiar with Windows XP and Windows 7 should know (by default) that DirectDraw is enabled under Windows XP and Windows 7. The difference is that under Windows XP users can disable it, and under Windows 7, it can't be disabled, which means that Windows 7 users can't solve the blackening problem of the screenshot by "disabling DirectDraw". By default, DirectDraw in Windows 7 cannot be disabled, but we can disable it by other workarounds:
Method 1: Modify the registry
Under Windows 7, run the Registry Editor, and then navigate to HKEY_LOCAL_MACHINE \\SYSTEM\\CurrentControlSet\\Control\\GraphicsDrivers\\DCI, then find and double-click "Timeout" in the right window, and then change the default value "7" to "0".
in the pop-up window. After the completion, save the settings to exit, and then take effect the next time you start.
Method 2: Install Windwos7 dedicated driver
Some Windows7 users may find that after modifying the registry and restarting the computer, DirectDraw is still enabled under Windows 7, that is, by modifying the registry method, Can achieve the purpose of disabling DirectDraw.
This situation occurs because Windows7 differs from Windows XP in terms of graphics card driver. Some video card users need to download and install dedicated drivers under Windows 7, some public version drivers, and some Windows XP drivers, they are Windwos7. The following is the state of DirectDraw cannot be modified.
As with other DirectX components, DirectDraw maximizes the use of hardware to perform a specific function whenever possible, and allows features that are not supported by the hardware to be implemented in software emulation.