@p-value, as far as I can see you have Windoze using two partitions and you are probably running in BIOS mode with a msdos parted disk. Make sure this is correct!! Make sure as well that fast boot are switched off in your firmware and Fast startup is completely disabled in Windoze.
In this case you simply need to boot the live ISO in BIOS (legacy) mode from your firmware and then create in Calamares in manual partition mode 2 partitions, one for / and one swap (if you want). Make sure to select MBR as location for the boot loader, then you should be fine.
There is absolutely no need to change anything to UEFI mode or repartition to gpt, BIOS mode and msdos parted disks run fine with dual boot.