Yes you can DualBoot with Win7/8/10, but you need to be an expert.
But you must have a PC that has the hardware supported by AROS, i suggest to try first with a Virtual Machine
To do this easily you must first install Win10 and leave a partition "Raw" after the installation of Win10 avii the DVD or Pendrive Live AROS One and run InstallAROS that will recognize the partition "Raw", which first must initialize it and after rebooting install AROS One that will create the DualBoot, I attach my DualBoot AROS One / Windows10
Test Video:
DualBoot - AROS One / Win10 (for optimal viewing set the video to 720p)