Dual Boot SteamOS Without Reinstalling Windows! (Xbox ROG Ally, Legion Go, MSI Claw etc.)

In this video, I will show you how to dual boot Windows and the official SteamOS on the ROG Ally X in under 10 minutes. Best of all, you do not need to reinstall Windows or format your handheld! This step-by-step guide walks you through the entire process of setting up Valve's official operating system alongside your existing Windows 11 installation. While alternatives like Bazzite or other SteamOS forks are great, nothing beats the real thing. This official SteamOS installation allows you to keep all of your Windows games and apps completely safe while gaining access to the streamlined, console-like performance of SteamOS gaming mode. This method is not just for the ASUS ROG Ally X; it also works on other compatible Windows handhelds like the Lenovo Legion Go and MSI Claw. If you want the absolute best of both worlds—the raw power and battery life of the ROG Ally X combined with the seamless user interface of SteamOS—this quick guide is for you. Follow Me:   / iamlxm0     / iamlxm0      / @iamlxm0     / iamlxm0   LINKS & INFO: SteamOS Image: https://store.steampowered.com/steamo... MiniTool Partition Wizard: https://www.partitionwizard.com Rufus: https://rufus.ie/en Dual Boot Script: https://github.com/Josh5/steamos_dual... Original Video of The Script by Josh5:    • Dual Boot SteamOS Next to an Existing Wind...   Please note, the error at 09:45 is caused because the 2 OS treat the system real-time clock differently. here is an explanation and a solution: Explanation : Linux usually assumes the RTC (Real Time Clock) is in UTC while Windows usually assumes the RTC is in local time. So if you keep switching between the systems this issue might happen again because Windows might resync the clock automatically and that will bring back the update error in SteamOS whenever you will try to update it (or use any type of TLS). Solution : To permanently fix that, you need to set windows to use RTC like Linux (with UTC). To do that do the following: https://wiki.archlinux.org/title/Syst... Thanks again to Josh5 for helping with this fix! Nintendo Switch 2 Playlist:    • Nintendo Switch 2: Accessories & Tips   Cozy Candlelight Gaming Playlist:    • Cozy Gaming: Handheld Mode Gameplay   Chapters: 00:00 Dual boot SteamOS Without Deleting Windows Partition 01:13 Windows Preparations & Image 02:20 Shrink The Windows Partition 03:50 Flash The Steam Deck OS Image 04:30 BIOS Settings For SteamOS Dual Boot 05:44 How To Open Boot Manager on Asus Rog Ally X 06:30 Install SteamOS Using the Dual Boot Script 09:30 SteamOS Setup 09:45 SteamOS Update error - An error was encountered during the update process. (Easy Fix) 10:52 SteamOS on ROG Ally X Works Great! 11:23 Windows 11 lives perfectly with Steam OS on The Same Disk #ROGAllyX #SteamOS #DualBoot #WindowsHandheld #GamingHandheld #SteamDeck #TechGuide #ASUSROGAlly