Have you got the option to change from Legacy to UEFI?
If so, make sure your SATA mode is in AHCI or IDE, not RAID.
Before doing that, you will need to create a copy of Legitimate Windows 10 to boot from. To do that, you can go to the following download link by Microsoft:
Windows 10 ISO
Select which Windows version you currently have, and click download.
Once you've downloaded it, you will need to download Rufus for allowing you to boot from the USB (Universal Serial Bus Controller). The link is below:
Rufus - Create bootable USB drives the easy way
When that's done, insert you're USB Drive and start up Rufus. Make sure to allow Rufus to make changes to your Computer.
Rufus should now appear. Select your USB Drive and select you're ISO. When you've done that, change the Boot Type to "GPT for UEFI Based." And click start.
You're done creating you're Legit Windows 10 Flash Drive. Leave you're flash drive in your PC and shut you're PC down. Repeatedly tap F2, F8 or Del(ete) to enter you're BIOS. You are now in your BIOS. Make the changes that I told you to at the top of my current post. Adding to that, make sure to change the boot order so that you're USB is top priority in booting first. Once you've done all of that, save your changes and exit.
Wait a while as you're USB drive is being booting in to. If it has not been booted into, restart you're PC. You are now in the Windows 10 Installer.
IMPORTANT-MAKE SURE YOU HAVE BACKED UP YOURE IMPORTANT DATA ONTO ANOTHER USB FLASH DRIVE BEFORE CONTINUING.
Press "Shift and F10," at the same time and Command Prompt will start up. Open an elevated command prompt (right-click Command Prompt, and then click Run as Administrator) and type diskpart. If the disk does not contain any partitions or volumes, skip to step 6.
At the DISKPART prompt, type list disk. Make note of the disk number you want to convert.
At the DISKPART prompt, type select disk <disknumber>.
At the DISKPART prompt, type clean. The command will take 1-4 Hours to execute and will COMPLETELY ERASE you're hard drive.
Once that's done type in "convert gpt."
Type in "exit," and then type in "exit," again. You're Command Prompt Window is now closed. Carry on with the installation process. If it asks you for you're Product Key, press the Skip button.
When the screen that says Upgrade or Custom comes up, select Custom.
You're now in the Custom option. Click the next button and Windows should start Copying Files and Ggetting them Ready. When the screen that says "You're PC will restart in () seconds, pull you're USB out.
Windows should now get you're drivers ready.
Once that's done, carry on with the installation progress yourself and you are done! The only reason you will have to do the last step yourself is because it asks you personal questions and what you would prefer.
When you are at the Windows 10 home screen, insert you're USB with you're important files and drag you're files onto you're desktop. There, Windows 10 is now installed and fresh.