Hello Markee07
You can install Windows 10 Pro on a UEFI system as long as your HDD's partition scheme is set to GPT. If it isn't and the partition scheme is set to MBR, I am afraid you will need to remove the partitions, change the partition scheme to GPT and then install Windows 10 Pro.
If you don't want to remove the partitions, you can try changing UEFI to BIOS/Legacy in the BIOS setup.
Hope this helps.