Windows BSOD Error 0x0000006F — SESSION3_INITIALIZATION_FAILED Fix

What Does This Error Mean?

The 0x0000006F blue screen means Windows failed to start one of its early session initialization processes — specifically Session 3. This happens very early in the boot process before the desktop loads. It is almost always caused by corrupted Windows system files, a bad Windows update, or a problem with the Windows Registry. Your computer will loop through restarts until the problem is fixed.

Affected Models

Windows 10
Windows 11
Windows 8.1
Windows 7

Common Causes

Critical Windows session startup files have become corrupted, preventing the system from initializing
A Windows update installed incompletely has damaged the boot initialization sequence
The Windows Registry has been corrupted, causing session startup to fail before Windows loads
A recently installed driver is loading too early in the boot sequence and crashing the system
A failing hard drive or SSD is unable to read the boot files needed for session initialization

How to Fix It

When your computer crashes and restarts, watch for 'Automatic Repair' or press F8 to access Advanced Boot Options. Choose 'Startup Repair' and let Windows try to fix itself automatically.

Windows may attempt Automatic Repair on its own after a couple of failed boots. Let it run — it fixes many session initialization errors.
If Startup Repair does not fix it, go to Advanced Options > System Restore and restore your computer to a date before the error started.

This does not delete your personal files. It only reverts Windows system settings and files to an earlier working state.
Boot from a Windows installation USB, choose Repair your computer, then open Command Prompt. Type: sfc /scannow /offbootdir=C:\ /offwindir=C:\Windows

This runs the file checker on an offline Windows installation — useful because the error prevents normal Windows from loading.
In the recovery Command Prompt, also run: DISM /Image:C:\ /Cleanup-Image /RestoreHealth to repair the Windows component store.

This command works even when Windows cannot boot normally and can fix corruption that sfc cannot reach.
If all repair options fail, perform a Windows reinstall by choosing 'Reset this PC' from the Advanced Options menu. Choose 'Keep my files' to preserve your personal documents.

This is a last resort but it reliably fixes initialization failures caused by deep system file corruption.

When to Call a Professional

If Startup Repair and System Restore do not fix this error, a technician can perform a Windows repair install — reinstalling Windows while keeping your files and programs. If the hard drive itself is failing, they can clone your data to a new drive before it is lost. Do not keep attempting to reboot a failing drive repeatedly, as this can cause data loss.

Frequently Asked Questions

What is Session 3 in Windows?

Windows uses numbered 'sessions' to separate different users and system processes. Session 0 runs system services, and Session 1 onwards are for logged-in users. Session 3 initialization failure means a critical early step in setting up the Windows environment did not complete. Without it, Windows cannot safely hand control over to the login screen.

Can I recover my files if Windows will not boot?

Yes. You can boot from a Windows installation USB or a Linux live USB to access your files. Plug in an external hard drive and copy your important documents, photos, and other files before attempting any repairs. Your personal files are stored in C:\Users\YourName\ — that folder is safe to copy.

Will this error come back after I fix it?

If it was caused by a corrupted file or update, fixing it once is usually permanent. If it was caused by a failing hard drive, the drive will continue to deteriorate and the error may return. Running chkdsk to check your drive health is a good idea after fixing any boot-level error.