How to Fix Windows 11 Boot Loops After Jan 2026 Update

The Windows 11 KB5074109 update has introduced security enhancements, but for some PCs, it has caused a critical issue. The update prevents Windows from mounting the boot volume. Consequently, it results in: 

• Black or blue screens of death(BSOD)
• Inability to reach the PC
• Automatic restart loops 

Users must enter the Windows Recovery Environment (WinRE) to solve the issue. 

Use Windows Recovery Environment (WinRE)

Windows Recovery Environment (WinRE) provides access to advanced tools when Windows fails to start. 

Method A: Automatic Entry

• Start your computer
• As soon as you see the Windows logo, press and hold the power button until the System shuts down. 
• You must repeat this process three times in a row. After multiple interruptions, WinRE will launch automatically. 

Method B: Boot from Installation Media

If, in any case, the automatic launch does not work, use a Windows 11 USB drive: 

• Integrate a Windows 11 USB installation
• Boot the System through the BIOS or UEFI boot menu
• Press the command Repair your computer, go to Troubleshoot, and choose Advanced options. 

Uninstall the Problematic Update

Once WinRE is launched automatically: 

• Choose the option, Troubleshoot, go to advanced options, and click on “Uninstall updates 
• Make sure you select to uninstall the latest quality update (KB5074109)
• Follow the process and reboot your computer. 

This is one of the safest fix methods because it uninstalls the update causing the boot loop. 

If Uninstall Fails or Isn’t Available

In some cases, you might encounter the error 0x800f0905 because the GUI uninstaller is missing. 

Try System Restore (WinRE)

• Choose Troubleshoot, go to advanced options, and click System Restore. 
• Thus, choose a restore point before the update happens. 

Additionally, if a restore point exists, it restores the files automatically rather than using the command manually. 

After Recovery — Pause Future Updates

Once you regain access: 

• Pause Windows updates by going to Settings, then Windows Update. 
• Click on Pause updates for 7-30 days. This is to prevent re-installing KB5074109 before the issue is resolved. 

Furthermore, ensure to take a complete backup after the recovery. This step will protect you from any future update missteps.

If WinRE can’t access your volume or commands fail due to drive corruption, consider contacting Microsoft Support or a professional. Some reports indicate that corrupted boot metadata on BitLocker drives may require specialist assistance.