Can somebody help me to guide me to how to install windows as a dual-boot since I'm on Zorin OS. I regret keeping Zorin OS as one lol.
If you have multiple drives, you can install Windows on a separate hard drive (it is best to disconnect or disable the Zorin hard drive beforehand in BIOS).
If you want to install Windows on the same drive as Zorin, it is best to install Windows first, as Windows often overwrites Zorin's grub bootloader when installed later.
In the Zorin installation program, select "Install Zorin alongside Windows" and as device for bootloader installation set the efi partition / Windows boot manager (when you have an UEFI).