Stop Error 0x00000050 occurs when new StorPort features are implemented in Windows 8 or Windows Server 2012

Applies to: Windows 8Windows 8 EnterpriseWindows 8 Pro


On a computer that is running Windows 8 or Windows Server 2012, invalid memory access randomly occurs and causes the computer to crash. When this problem occurs, you receive a Stop error message that resembles the following:

STOP 0x00000050 (parameter1, parameter2, parameter3, parameter4)

  • This Stop error describes a PAGE_FAULT_IN_NONPAGED_AREA issue.
  • The parameters in this error message vary, depending on the configuration of the computer.
  • Not all "Stop 0x00000050" errors are caused by this problem. This issue occurs when the Server service handles some server message block (SMB) requests from some remote computers.

This problem occurs on any drivers that implement the new features and improvements of the Windows 8 storage (StorPort) driver.


This issue occurs because the StorPort driver does not limit the uncached allocation to a 4-gigabyte (GB) region.


This hotfix is also available at Microsoft Update Catalog.

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, go to the following Microsoft website: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


To apply this hotfix, you must be running Windows 8 or Windows Server 2012.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any previously released hotfix.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.