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0x000000ABBSODWarning

0x000000AB — Session Has Valid Pool on Exit | Blue Screen Fix Guide

SESSION_HAS_VALID_POOL_ON_EXIT

Windows XPWindows VistaWindows 7Windows 8Windows 10Windows 11

What Does 0x000000AB Mean?

A session was exiting while it still had valid pool allocations that should have been freed.

Real-World Causes

  1. 1Session-space driver memory leak
  2. 2Driver not freeing session pool on exit
  3. 3Terminal Services driver bug

Symptoms

  • ⚠Blue screen with stop code SESSION_HAS_VALID_POOL_ON_EXIT
  • ⚠System reboots unexpectedly
  • ⚠Possible data loss from unsaved work

DIY Fix

Beginner-friendly steps you can try at home

  1. 1Restart your computer
  2. 2Run Windows Memory Diagnostic (mdsched.exe)
  3. 3Reseat RAM modules
  4. 4Check for Windows updates

Advanced Fix

For experienced users and IT professionals

  1. 1Test RAM with MemTest86 for multiple passes
  2. 2Analyze minidump with WinDbg
  3. 3Check for memory leaks using poolmon
  4. 4Inspect physical RAM slots and modules

Frequently Asked Questions

What causes SESSION_HAS_VALID_POOL_ON_EXIT?
A session was exiting while it still had valid pool allocations that should have been freed.
Can I fix Session Has Valid Pool on Exit myself?
In many cases yes. Start with basic troubleshooting like restarting, updating drivers, and running System File Checker. If the issue persists, advanced analysis of crash dumps may be needed.

Related Error Codes

0x000000BASession Has Valid Views on Exit0x000000ECSession Has Valid Special Pool on Exit

About the Author

Windows Troubleshooting Team

Verified against official Microsoft documentation and real-world diagnostic data. Error behavior confirmed across Windows 10, Windows 11, and Windows Server.