Session has valid pool on exit [BSoD error fixed]

Tashreef Shareef
by Tashreef Shareef
Windows & Software Expert
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  • Seeing the BSoD Session has a valid pool on exit error can cause fear in the hearts of all Windows 10 users.
  • To resolve this issue, start by installing the Microsoft hotfix, and also uninstalling any updates.
  • If you want to explore some more Windows 10 issues and their resolution, check out our extensive Windows 10 Errors Hub.
  • To always have a quick way to resolve a BSoD error, bookmark our extensive BSoD Error Codes section.
Windows 10 BSoD error

You may encounter a stop error session has a valid pool on exit on the terminal server when trying to log off from a Remote Desktop Services session.

The error stops the remote desktop session to the remote desktop server from responding followed by an abrupt disconnect.

According to Microsoft, the error occurs because of some objects that the Win32k.sys driver allocates from the session pool are not freed before the session ends.

The error can be fixed by installing a hotfix provided by Microsoft. Follow the steps in the article to know how to fix the error with your Windows server, 7, and 10 systems.


Fix: SESSION_HAS_VALID_POOL_ON_EXIT stop code 0x000000AB

1. Install Microsoft hotfix

Session has valid pool on exit

  1. Open Microsoft update catalog
  2. Download the hotfix, depending on the version of Windows you are using.
  3. It should work with the newer version of Windows, such as Windows 10 just fine.
  4. Once downloaded, run the installer and install the update.
  5. Reboot the computer and check if the error is resolved.

If the issue persists even after installing the update, try uninstalling kb4088875 and kb4088878 from your system to see if that helps.

Session has valid pool on exit

  1. Click on Start and select Settings.
  2. Click on Update and Security.
  3. Open the Windows update
  4. Scroll down and click on View update
  5. Click on Uninstall updates.
  6. In the new window, locate the following updates:
    kb4088875
    kb4088878
  7. Select the update and click on Uninstall.
  8. Repeat the step for the second update as well.
  9. Once the updates are uninstalled, reboot the computer.

Install Windows updates

If you haven’t updated your Windows system for a long time, check if there are any pending updates available. Windows updates usually consist of hotfixes that fix bugs and glitches in the previous updates.

  1. Click on Start > Settings.
  2. Go to Update & Security.
  3. Open WindowsUpdate.
  4. Download and install all the pending updates.

2. Check for Windows OS compatibility

Session has valid pool on exit

If the session has a valid pool on exit error is occurring after or when using a peripheral device like a printer, make sure the printer driver is compatible with your Windows version.

Similar errors have been reported by the users with old printers with discontinued driver support for Windows 7.

To diagnose the issue, disconnect the printer and check if the error occurs with the printer disconnected. Connect the printer to a Windows 10 computer to see if the error is resolved.

Try upgrading your PC to Windows 10 to resolve compatibility issues. Follow our guide on how to install Windows 10 for a step by step tutorial.


3. Restore to an earlier point

Session has valid pool on exit

  1. Press the Windows key.
  2. Type system restore.
  3. Click on Create a Restore Point option.
  4. Click the System Restore button in the System Properties window.
  5. Select Next to proceed.
  6. Select the most recently created restore point.
  7. Click on Scan for affected programs. This will show if Windows will uninstall any existing programs on your system.
  8. Click Next to continue with the restore process.
  9. Read the description and then click on Finish.

Windows will now restore your computer to the state it was in before the event shown in the description. The process may restart your system a few times to apply the changes.


The session has a valid pool on exit error usually occurs if you have a bad patch of Windows installed. However, the error can easily be fixed by installing the hotfix or uninstalling the bad updates.

You can also make use of system restore points in case the issue persists. Do let us know which method helped you resolve the issue in the comments.

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