Permanently disabling the driver signing application: You will need to repeat this process every time you want to use unsigned drivers.
When the menu appears, scroll with the arrow key to “Disable driver signature enforcement” and press “Enter”. Turn the computer on and press the F8 key every second or so during the boot process until additional boot options appear. Restart your computer and wait for it to shut down completely. To disable driver signatures, follow these steps: Make sure you know what you are doing and only install drivers you trust. After completing this step, you can install drivers that are not officially signed. Some users have disabled driver signing and have been able to bypass this problem after performing this step. This prevents malicious software from injecting itself into the Windows kernel. Follow these steps to fix the “A Required CD/DVD Drive Device Driver is Missing” message during Windows 7 installationĭriver signing ensures that only drivers that have been sent to Microsoft for signing are loaded into the Windows kernel. Try the following solutions to resolve the problem. When installing from CD this problem does not occur. You will only encounter this problem when installing Windows 7 via USB. 
This means that there is a mismatch between the USB drivers. And you all know that Windows 7 is very old (it supports USB 2.0 ports). This problem occurs because the computer you are installing Windows 7 on has the latest motherboard (next generation) and USB 3.0 ports. So if a USB drive is not recognized by Windows PE, you could have this problem and the system could not be installed. Windows PE is built on top of the Windows 7 kernel and is used to prepare your computer for a Windows installation. The problem is related to the fact that the USB drive is not recognized by Windows PE (Windows Preinstallation Environment). What causes the message “A Required CD/DVD Drive Device Driver is Missing” when installing Windows 7?
How do I install Windows 7 if the CD ROM doesn’t work?. 
How do I fix missing device drivers in Windows 7?. 
How do I fix the “required CD/DVD driver” error in Windows 7?. Disconnect the USB drive and insert it into another USB port. Disconnect the USB drive and insert it again. Disable the driver signature enforcement. Follow these steps to fix the “A Required CD/DVD Drive Device Driver is Missing” message during Windows 7 installation. What causes the message “A Required CD/DVD Drive Device Driver is Missing” when installing Windows 7?.
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