According to your description, please try the following methods:
1. Set the BIOS to WIN7 compatibility mode, put in the system installation disk, boot up the computer and press the F2 key to enter the BIOS setup, select the BOOT option - Secure Boot set to "Disabled"
Choose OS Mode Selection set to CSM OS
Select OS Mode Selection set to CSM OS.
Select OS Mode Selection and set it to CSM OS
2. Select Fast Bios Mode under Advanced option and set it to "Disabled"
Select Boot Device Priority and select Optical Drive Priority to boot
3. p>3. Press F10 to save and exit
Press the prompts to install the system, after the system is installed, go to Samsung's official website to download SWUpdate software to update the WIN7 driver.
Download address:/ask