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ZippZayz's avatar
ZippZayz
Iron Contributor
Jul 31, 2025

Windows 11 error: The installation failed in the SAFE_OS phase with an error during BOOT operation

Not a tech savvy and seek help from this Microsoft tech community. My pc keeps getting this error during the installation process when I was trying to upgrade my PC to Windows 11. The installation ...
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Timie's avatar
Timie
Iron Contributor
Jul 31, 2025

The error "The installation failed in the SAFE_OS phase with an error during BOOT operation" during a Windows 11 upgrade or installation typically occurs due to issues with disk partitions, Secure Boot, TPM, or corrupted installation files. Here’s how to troubleshoot and fix it:

1. Check System Requirements

Ensure your PC meets Windows 11’s minimum requirements:

  • TPM 2.0 (Trusted Platform Module) enabled in BIOS.
  • Secure Boot enabled.
  • UEFI mode (not Legacy/CSM).
  • Sufficient disk space (64GB+).

2. Clean the Disk and Reinstall

Damaged or broken disk partitions can cause this error. Try:

  1. Backup your data.
  2. Create a Windows 11 USB installer using Media Creation Tool.
  3. Boot from USB, select Custom Install.
  4. Delete all partitions on the target drive and install fresh.

3. Use DISM & SFC for System Repair

Corrupted system files can cause installation failures:

Open Command Prompt (Admin).

Run:

sfc /scannow
dism /online /cleanup-image /restorehealth

Restart and retry installation.

 

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