Can I install another version of windows?

Hi so atlasos came out and I wanted to figure out if I can add it to the boot process for zorinos', you know, the one that looks cool. So how do I add it?

I am confused by the title of this thread, Should it read "Can I install another Linux OS as well as Zorin?
Are you running a dual-boot of Windows and Zorin right now?

There is no reason why you cannot add a third OS to an existing dual boot, as long as you do not exceed 4 bootable partitions. e.g.