According to your description, I suggest you try to install the WIN7 operating system as follows:
1. Use third-party USB flash drive production software to make USB flash drive startup disk, download genuine system image or pure version image, download image file with ISO suffix and copy it to USB flash drive root directory.
2. Press F2 to enter BIOS setup. Select the boot option—the secure boot is set to "Disabled" and the operating system mode selection is set to CSM operating system. Select the fast Bios mode in the advanced menu, set it to "Disabled", press F 10 to save and exit.
3. Restart the computer, press F 10 to enter the quick start, select the U disk to enter the installation interface, delete all partitions on the home page, then create new partitions, and finally install the system on the C disk.
4. After installing the system, please go to official website/support/support/main/supportmain.do.
Enter the detailed model of the machine and download SW-UPDATE update driver software.
5. Pay attention to the important data of the backup machine. Once the genuine WIN8 system is partitioned and formatted, it cannot recover itself.
If there are still problems through the above methods, please bring the purchase invoice, maintenance card and machine to Samsung service center, and the engineer will check and deal with the machine.
Samsung Service Center Address:
. Samsung . com/support/service locations . ASP
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