Microsoft Windows Error Code 0x00000071: How to Fix It

Medium 2-4 hours High Severity Verified June 2026
Error Code
0x00000071
Brand
Microsoft Windows
Product Type
operating_system
Severity
High
DIY Difficulty
Medium
Estimated Fix Time
2-4 hours
Windows error code 0x00000071 (SESSION5_INITIALIZATION_FAILED) is a critical blue screen error that occurs when Windows cannot properly initialize Session 5, which manages user sessions and system services. This error typically causes your computer to crash and restart unexpectedly, often preventing normal startup.
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Tools You'll Need

How to Fix Error Code 0x00000071

  1. Boot into Safe Mode

    Make sure to save any important work before restarting as unsaved data may be lost.
  2. Run System File Checker

  3. Check System Memory

    Save all work before running memory diagnostics as your computer will restart immediately.
  4. Update or Roll Back Device Drivers

  5. Perform System Restore

    System Restore will uninstall recently installed programs and drivers, but personal files will remain intact.
  6. Run DISM Tool

  7. Check Hard Drive Health

    The disk check process can take several hours and should not be interrupted once started.

Parts You May Need

RAM memory modules
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RAM memory modules
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SATA or NVMe SSD
Check Price on Amazon
External backup drive
Check Price on Amazon
RAM memory modules
Check Price on Amazon
SATA or NVMe SSD
Check Price on Amazon
External backup drive
Check Price on Amazon
RAM memory modules
Check Price on Amazon
SATA or NVMe SSD
Check Price on Amazon
External backup drive
Check Price on Amazon
RAM memory modules
Check Price on Amazon
SATA or NVMe SSD
Check Price on Amazon
External backup drive
Check Price on Amazon
RAM memory modules
Check Price on Amazon
SATA or NVMe SSD
Check Price on Amazon
External backup drive
Check Price on Amazon
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When to Call a Professional

Contact a computer technician if the error persists after trying all steps, if you're uncomfortable working with system files and registry settings, if memory tests reveal hardware failures, or if you suspect motherboard or CPU issues. Professional diagnosis may be needed for hardware replacement.

Frequently Asked Questions

What causes Windows error 0x00000071?
This error is typically caused by corrupted system files, faulty RAM, outdated or incompatible drivers, registry corruption, or failing hard drive sectors. Recent Windows updates or new hardware installations can also trigger this error.
Can I fix error 0x00000071 without losing my files?
Yes, most repair methods like System File Checker, DISM tool, and System Restore preserve your personal files. However, it's always recommended to backup important data before performing system repairs as a precautionary measure.
How do I know if my RAM is causing this error?
Run Windows Memory Diagnostic (mdsched.exe) or use MemTest86 to thoroughly test your RAM. If memory errors are detected, you'll need to replace the faulty RAM modules. Random crashes and blue screens often indicate memory issues.
Should I reinstall Windows to fix this error?
Reinstalling Windows should be a last resort. Try all other troubleshooting steps first, including System Restore, driver updates, and system file repairs. A clean Windows installation will require reinstalling all programs and may result in data loss.
Why does this error happen during startup?
Error 0x00000071 during startup indicates that Windows cannot initialize essential system services or user session management. This often points to corrupted system files, registry issues, or driver conflicts that prevent proper system initialization.