Yes—Valve’s current Windows installation guidance says to update SteamOS first so the Deck has the latest BIOS with fTPM support. That addresses the TPM part of Windows 11 preparation, but it does not certify every Deck model or make Windows an officially supported Steam Deck operating system. Valve provides Windows drivers and installation notes, while stating that it does not support Windows on Steam Hardware.
What Valve’s fTPM guidance means
Valve’s Steam Hardware – Windows Resources page tells users to install the latest SteamOS update before installing Windows 11; that update includes the latest BIOS with fTPM support. Valve does not specify a current BIOS build or SteamOS version on the guidance reviewed here, so use the live page rather than relying on an old version number.
fTPM is firmware-based Trusted Platform Module functionality. Its presence addresses Windows 11’s TPM requirement, but TPM is only one part of the operating system’s minimum requirements. A TPM update does not by itself establish that every Windows feature, driver, or game will work as expected on a Deck.
Windows 11 has requirements beyond TPM
Microsoft’s Windows 11 System Requirements list the following general PC minimums. They are Microsoft’s requirements, not a Valve certification of every Steam Deck model.
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| Requirement | Microsoft’s minimum |
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| Memory | 4 GB RAM |
| Storage | 64 GB or larger storage device |
| Firmware | UEFI firmware that is Secure Boot capable |
| TPM | Trusted Platform Module (TPM) version 2.0 |
| Graphics | DirectX 12-compatible graphics with a WDDM 2.0 driver |
| Display | More than 9 inches diagonally, at least 720p resolution, with 8 bits per color channel |
For initial setup of Windows 11 Home or Pro for personal use, Microsoft also requires internet access and a Microsoft account. Check Microsoft’s current requirements page for the full details and any changes.
Prepare using Valve’s Windows resources
- Install the latest SteamOS update before installing Windows 11, as Valve directs. The update includes the latest BIOS with fTPM support.
- Open Valve’s Steam Hardware – Windows Resources page and follow its current instructions for your Deck model and the Windows drivers available there.
- Review the Windows 11 requirements and decide where Windows will be installed before proceeding. The sources establish that the Deck can multi-boot and boot an operating system from microSD, but they do not establish a Valve-supported Windows dual-boot setup assistant.
Valve provides Windows driver resources but says it does not support Windows on Steam Hardware. That distinction matters: official driver downloads do not amount to end-to-end Windows support from Valve.
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Choose an installation approach carefully
Valve’s Steam Deck FAQ says the device can multi-boot and can boot an operating system from microSD. Those are general capabilities, not a guarantee that a particular Windows installation method is supported or straightforward.
- Keep SteamOS: Multi-boot can let you choose between operating systems, but installation steps and storage changes depend on the method. Follow Valve’s Windows-specific notes rather than assuming the FAQ describes a complete dual-boot procedure.
- Use removable media: Booting an operating system from microSD is a general Deck capability. The FAQ does not promise a Windows-specific workflow or endorse a particular card, drive, hub, or adapter.
- Modify internal storage: Consider carefully how the installation method affects existing data and SteamOS. The cited Valve guidance does not certify a particular partitioning process.
A USB-C hub or dock may be useful for connecting peripherals in some setups, but the sources do not establish one as universally necessary. Check the actual installation instructions for the approach you choose before buying extra hardware.
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Check TPM and Secure Boot status
Steam Support’s Secure Boot & TPM 2.0 guidance describes checking these features through Steam’s System Information. If you are already in Windows, use its built-in tools to inspect what the system reports:
- Run
tpm.mscand look for the TPM’s Specification Version. - Run
msinfo32and check BIOS Mode and Secure Boot State.
These checks report the feature status visible to the operating system; they do not establish that the entire Windows installation or every game is supported.
Why older reports say fTPM was still coming
Valve’s earlier Steam Deck announcement said Windows 11 required a BIOS with fTPM support and that Valve was working on one at the time. Valve’s current Windows Resources guidance supersedes that historical status by telling users to update SteamOS first for the latest BIOS with fTPM support.
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