New
#1850
Always unplug all other HD's when installing a new OS, even for Dual Boot. Otherwise the installer will only update the boot files on the old OS to create a Dual Boot.
Please post back a screenshot of you maximized Disk Mgmt drive map and listings showing all columns. Use the Snipping Tool in Start Menu, attach to Reply using paper clip in Reply box. Tell us what's on each partition, which you wish to keep. We will give you the steps to move the boot files onto the new OS.