System hacks: conventional methods do not work how to intercept these pictures

When there are problems with the system and we need to take screenshots for help or create various tutorials, we often need to capture some special images, such as UAC (User Account Control) intercept images, Windows 10 login screen, etc. These images cannot be directly intercepted using the conventional methods. So, how to solve it?

● User account blocking hint map – screenshots and sketches

By default, when running programs with shield markings on their icons in Windows 10, the system pops up a user account control prompt. Since Windows 10 blocks all programs running in the background in this state, it will not be possible to capture them using the regular screenshot method.

One solution is to enter the Group Policy Editor and make changes (see the link after the article), while another method is to use the “Screenshot and Sketch” component’s time-delay method to intercept. Here is an example of running the Registry Editor as an administrator. Start the “Screenshot and Sketch” component and click “New → Screenshot after 10 seconds” to activate the screenshot function (Figure 1).


Now launch the Registry Editor and wait 10 seconds for the User Account Control prompt to pop up, at which point a yellow border will appear around the desktop (prompting the start of the screenshot). Then press Esc and you can use the mouse to select the current user account blocking prompt area to take a screenshot. When you have finished taking the screenshot, click “Cancel” to cancel the Registry Editor and return to the screenshot and sketch window to see the successfully captured image (Figure 2).



For taking screenshots of pop-up menus, Wi-Fi connection windows and password input boxes, you can also use the above time-lapse screenshot method.

● Intercepting Windows 10 login screen – Remote Desktop

By default, the Windows 10 login screen blocks all current programs from running, so naturally the traditional method cannot run the screenshot program to take a screenshot. If you have two computers, you can use the other computer to indirectly take a screenshot via a remote desktop connection (see the Firelink after the article for the method).

If you do not have two computers, you can use your Android phone to take similar screenshots. First, connect your phone and computer to the same LAN, and execute “Advanced system settings→System properties→Remote→Allow remote connection to this computer” on the computer side. Next, install Microsoft Remote Desktop on your Android phone, launch the application and click “Settings→Display→Customize” in the upper left corner, the resolution can be set using the full resolution of the phone or according to the common width of the desktop, so that you can capture a clearer picture (Figure 3). This will allow you to capture clearer images (Figure 3).


Click “+→ Desktop” in the upper right corner, select the current computer in the found connected devices, click “Connect”, so that you can see the computer desktop on the phone after successful connection, click the on-screen keyboard icon as prompted (it is recommended to set it to landscape interface), and then click on the “Keyboard” icon in the After expanding the keyboard on the phone, press Win+L to enter the lock interface and use the phone screenshot component to complete the screenshot (Figure 4).



If you are using a Home or Basic edition of Windows that does not have Remote Desktop by default, you can use the open source free RDPWrap ( patch to enable this feature. In addition, if you need to intercept the screen such as the boot menu selection screen, Windows 10 installation, reboot, etc. after the computer is turned on, you can do so by installing Hyper-V virtual machine (please refer to the Firelink after the article for details).

● Intercept Android phone off screen – project to this computer component

Android phones also block all programs from running when the shutdown feature is activated, so screenshots cannot be taken through Android’s built-in screenshot app. android phones can be projected onto a Windows 10 computer screen, so this type of image capture can be done in the computer.

Enter “Project to this computer” in the search box (this component is not installed by default in the 2004 version, you need to execute “Available Features → Add Features → Install Wireless Monitor” before you can use it), start the component and complete the settings as shown in the figure (Figure 5) Then click on “Start Connection Application to project to this computer”.


Start a wireless connection on the phone and select the current computer from the devices searched, so that the phone screen will be displayed on the computer desktop after a successful connection. At this point, press the phone’s shutdown button, return to the computer desktop when the shutdown screen pops up, and use the “Screenshot and Sketch” component to complete the screenshot (Figure 6).


Using the same method, you can also capture the Android lock screen and other screens that indicate that you cannot take a screenshot (Figure 7). In short, you can take a screenshot of your phone as long as it can be displayed on the computer screen.


● BIOS screenshot – multiple methods to capture

For BIOS interface screenshots, if the motherboard already comes with a screenshot tool, such as the ASUS CM6870 motherboard, enter the UEFI BIOS Advanced Mode, and then press F12 to take a screenshot, but the image can often only be saved in the USB-connected external storage device, and to the file, you need to pre-insert the USB storage device. For motherboards that do not support screenshots, you can use the BIOS emulator to take screenshots, for example, Lenovo models can download “Lenovo BIOS Emulator”, run it and the BIOS interface will appear, follow the prompts to take screenshots (Figure 8).


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