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🆕 UEFI, BIOS & vTPM overview

EDIS Global VPS supports both BIOS (legacy boot) and UEFI (modern boot), as well as vTPM (software-based Trusted Platform Module). These options are primarily relevant for operating system compatibility, especially for modern systems like Windows 11.

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Find boot mode and TPM settings

Open your VPS under Services → My Services, then select Server Information → System Configuration. The controls are in Boot Settings. After applying a manual change, follow the required power-cycle instructions.
Boot Settings within the System Configuration dialog

Example selections; select settings appropriate to your installed OS.

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🧭 BIOS vs UEFI

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🟢 BIOS (default)

  • Legacy boot mode
  • Maximum compatibility
  • Use with operating-system images installed for legacy BIOS boot
  • Recommended for most Linux installations
The installed OS and deployment method determine the appropriate setting. Auto-Installers can select a different boot mode.

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🔵 UEFI

  • Modern boot standard
  • Required for newer operating systems
  • Supports advanced features like Secure Boot
Windows 11 requires UEFI with Secure Boot capability and TPM 2.0; see Microsoft’s Windows 11 requirements. Windows Server 2025 lists UEFI and TPM as requirements for certain features, rather than every installation. Check the requirements of your image and security features in Microsoft’s Windows Server hardware guide. Selecting UEFI alone does not prove that Secure Boot is enabled.

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🔐 What is vTPM?

vTPM (Virtual Trusted Platform Module) is a software emulation of a TPM chip. It is required for:
  • Windows 11 installation
  • Certain OS security features (disk encryption, secure boot chains)

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Options

  • None (Default) → TPM disabled
  • Software TPM → TPM enabled
👉 Only enable vTPM if your operating system requires it

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⚙️ Default configuration

To ensure maximum compatibility:
  • Boot Mode: BIOS
  • TPM: Disabled
These defaults are suitable for the majority of use cases.

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🤖 Auto-Installer behavior

When you use EDIS Global Auto-Installers, they:
  • Automatically select BIOS or UEFI
  • Enable or disable TPM as required
👉 Auto-Installers ignore manual settings to ensure a successful installation

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🧩 When manual configuration matters

Manual BIOS / UEFI / TPM settings are relevant when:

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✔️ Custom Cloud-Init images

  • You can:
    • Use current VPS settings, or
    • Override boot mode and TPM during deployment

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✔️ Custom ISO / uploaded images

  • Your VPS uses the System Configuration settings
  • If needed:
    1. Change Boot Mode / TPM
    2. Power-cycle the VPS
    3. Boot your image

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⚠️ Important considerations

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OS compatibility

  • An image must include a bootloader compatible with the selected firmware mode
  • Switching from BIOS → UEFI on an existing installation will usually result in:
    • ❌ Boot failure

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Changing boot mode

  • Boot mode must match how the OS was installed
  • Changing it later requires:
    • Reinstallation, or
    • Advanced manual recovery

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TPM usage

  • Not required for Linux in most cases
  • Only enable when explicitly needed
  • Adds complexity without benefit if unused

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🧾 Quick recommendations

  • Keep the existing boot mode for an installed system.
  • For a new custom image, follow its BIOS/UEFI and TPM requirements. Linux images may support either mode.
  • For Windows 11, select UEFI and Software TPM; check the remaining OS requirements as well.

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🧭 Summary

If you are unsure which configuration to use, the Auto-Installer will always choose the correct setup automatically.
Last modified on October 4, 2026