Did you actually boot from the install disc? Because, when you do, you have to select the drive.
Review the following guide for instructions and details about configuring your BIOS or UEFI boot settings for DVD, CD, USB or SD Card.
BIOS/UEFI Setup Guide: Boot from a CD, DVD, USB Drive or SD Card
https://www.groovypost.com/howto/bios-uefi-setu...
Once your computer is set to boot from the DVD or USB, you should see this option.
The Windows logo will appear on screen, this might be here for a while, as long as you see the indicater, everything should be ok.
Select your Language, Time and Keyboard method then click Next.
Click Install now
Wait while Setup starts.
Accept the license terms and click Next
Click Custom
Select the Primary Partition then click Next
You will receive the following warning:
The partition you selected might contain files from a previous Windows Installation. If it does, these files and folders will be moved to a folder named Windows.old. You will be able to access the information in Windows.old, but you will be able to use your previous version of Windows.
Click OK
Wait while Windows installs
When this phase of setup is complete, Windows will automatically restart and reboot into setup again.
Windows is detecting and installing your hardware. After this is complete, Windows will restart one last time.
Out of Box Experience
The Out of Box Experience page is where you get to configure detailed settings in Windows, which includes creating a user account, privacy, sync PC settings and install modern applications.
Windows will check if there is an active Internet connection. If it does not find one, you will be presented with the following screen.
Create a Local Account and click Next
Wait while Windows finalizes your settings
Continue to wait while Windows installs modern applications.
When setup is complete you can retrieve any personal files from the Windows.old
Browse to C:\ Local Disk and open the Windows.old folder