If you are receiving error The drivers for this device are not installed (Code 28) for one of the devices on your computer, then it simply means you need to install drivers manually. There is any number of reasons that a driver might not be installed for a device.

Before you install it, you may want to manually download the driver from the OEM or the hardware vendor’s website. Once the download is complete follow this:

1] Open Device Manager (WIN + X + M, and find the device in question.
2] Right click on the device, and remove it completely from the system.
3] Now go back to the top of the device manager, and right click to initiate the Scan for hardware changes to reinstall the driver.
4] Computer will prompt you to provide the path of the driver. Navigate to the OEM file you downloaded.

Note: Sometimes executing the EXE file is all you need to install the driver for the hardware.