This article describes a memory leak issue that occurs when one or more file system minifilter drivers are installed in Windows 8.1 or Windows Server 2012 R2. A hotfix is available to resolve this issue. The hotfix has a prerequisite. Hotfix information.

This article describes a memory leak issue that occurs when one or more file system minifilter drivers are installed in Windows 8 or Windows Server 2012. A hotfix is available to fix this issue. Before you apply this hotfix, note that this hotfix has a known issue. Known issue in this hotfix. Issue.

The issue occurs because of a deadlock situation in the Microsoft Filesystem Filter Manager (Fltmgr.sys). Resolution. 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.

This issue occurs because there is a deadlock between Windows NT kernel and the fltmgr.sys file. Resolution. Hotfix information. A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that described in this article.

Fix error 0xC2: Bad_pool_caller - Microsoft Support. Windows 10. This error means that you may need to revert to a previous configuration of your PC. Turn off your PC by pressing and holding the power button, then wait and press it again turn it back on. When you see your PC manufacturer's logo, turn the PC off again.

FLTMGR_FILE_SYSTEM (f5) An unrecoverable failure occurred inside the filter manager. This problem occurs on the node where the Cluster Shared Volume (CSV) that's hosting the VHDx file is owned. The node might be either a Scale Out File Server or Hyper-V cluster node. Cause.

Cause. This issue occurs because the svhdxflt.sys driver in a particular case calls the FltGetFileNameInformation routine, and then FMfn allocation is performed. However, the svhdxflt.sys driver misses a call to the FltReleaseFileNameInformation routine to release the allocation. Resolution. To resolve this issue, install update rollup 2975719.

Status. Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. References. Learn about the terminology that Microsoft uses to describe software updates. Fixes a problem that triggers a dramatic spike in CPU usage when a folder is renamed in Windows 8.1, Windows Server 2012 R2 ...

Method 1: Windows Update. This update is available through Windows Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to turn on automatic updating, see Windows Update: FAQ . Method 2: Microsoft Update Catalog.

This update makes improvements to the Windows recovery features for Windows 10, version 20H2, 21H2, and 22H2. REMINDER. Windows 10, version 2004 reached end of servicing on December 14, 2021 for all editions. For more information, see here.