By default, Windows will take over the boot priority. You need to install Clover within SteamOS to regain control.
Alternatively, for manual control:
Want a step-by-step guide or the best script links? Let me know, and I can expand this into a full tutorial. steamdeck clover dualboot
Here is your guide to setting up a dual-boot system with Clover on the Steam Deck. By default, Windows will take over the boot priority
Unlike the standard Steam Deck boot manager, which is a text-based list that requires holding volume buttons to access, Clover provides a that is navigable via the Deck's physical buttons or touchscreen. Pros Let me know, and I can expand this into a full tutorial
A Steam Deck with at least 256GB of storage (64GB is too small for dualbooting). A USB flash drive (16GB+) for the Windows installer. A USB keyboard and mouse (highly recommended). A USB-C hub to connect your peripherals. A full backup of your SteamOS data. Step 1: Partitioning your SSD