Tag Archives: “start-up slow”

[RESOLVED] Your computer may stop responding when you run an application, Software Firewall or anti-virus package that uses the Windows Filtering Platform API

Your computer may stop responding when you run an application, Software Firewall or anti-virus package that uses the Windows Filtering Platform API

This issue affects the following operating systems:

  • Windows 7 – Service Pack 1
  • Windows Small Business Server 2011 – Service Pack 1
  • Windows SBS 2011 – Service Pack 1
  • Windows Server 2008 R2 – Service Pack 1
  • Windows Small Business Server 2008 – Service Pack 2
  • Windows SBS 2008 – Service Pack 2
  • Windows Server 2008 – Service Pack 2
  • Windows Vista – Service Pack 2

In this situation, the computer may perform slowly or stop responding and network activity may be affected.  You find that a system restart may resolve this issue in some instances.

This issue occurs because the FwpsStreamInjectAsync0 function causes the interrupt request level (IRQL) to leak.  You can resolve the issue by updating to the latest Netio.sys driver.  The download link can be found within Microsoft KB 2664888 http://support.microsoft.com/kb/2664888

 

Windows Filtering Platform (WFP) General Description

Windows Filtering Platform (WFP) is a set of API and system services that provide a platform for creating network filtering applications. The WFP API allows developers to write code that interacts with the packet processing that takes place at several layers in the networking stack of the operating system. Network data can be filtered and also modified before it reaches its destination.

By providing a simpler development platform, WFP is designed to replace  previous packet filtering technologies such as Transport Driver Interface (TDI)  filters, Network Driver Interface Specification (NDIS) filters, and Winsock Layered Service Providers (LSP). Starting in Windows Server 2008 and Windows Vista, the firewall hook and the filter hook drivers  are not available; applications that were using these drivers should use WFP instead.

With the WFP API, developers can implement firewalls, intrusion detection systems, antivirus programs, network monitoring tools, and parental controls. WFP integrates with and provides support for firewall features such as authenticated communication and dynamic firewall configuration based on applications’ use of sockets API (application-based policy). WFP also provides infrastructure for  IPsec policy management, change notifications, network diagnostics, and stateful filtering.

More info can be found here http://msdn.microsoft.com/en-us/library/windows/desktop/aa366510(v=vs.85).aspx

 

Windows 7, Server 2008 R2 and SBS 2011 RTM or SP1 – svchost.exe may hold a lock on a service and cause slow Windows startup

You may find that svchost.exe holds a lock on a service whilst all the service libraries are being loaded.  This in turn then prevents any other services in the same instance of svchost.exe from starting up until the call to the function has been returned.

An updated version of svchost.exe that will address the issue is available here http://support.microsoft.com/kb/2510636

Microsoft Windows based Computers and Laptops – Slow System Startup with Realtek HD Audio Chipset

You may find that Windows based computers and laptops are very slow to startup and in some instances slow to shutdown.  This has been witnessed when out dated drivers are installed for the integrted Realtek HD Audio Chipset.

The Realtek HD Audio drivers offered on Microsoft Update are often dated 2005 and are many years behind those available directly from the Audio Chipset manufacturer.

You can verify your current Audio Chipset and Driver version from “Device Manager”

Please visit http://www.realtek.com/downloads/ to find and download the latest applicable drivers for your Windows system.  They will usually reference the drivers as “High Definition Audio Codecs (Software)” and then under Windows the list Operating System Compatability for each system and provide several download links based upon locations around the world.  Downloads from the Realtek site can be slow at busy times of the day so you may need to be patient and/or download outside peak hours.

As you can see from the table the current drivers from Realtek Support are dated 21st October 2011 and are usually updated every 1-2 months, it would be worth updating to the latest release to resolve your slow startup times and then add updating your audio drivers into your usual computer maintenance schedule.  Once you have updated remember to check Device Manager to ensure that the latest drivers are actually installed and that the device is operating correctly.

Windows 7/Windows Server 2008 R2/SBS 2011 RTM or SP1 – Slow System Startup and Login

You may experience very slow system start up on occasion, this is due to Windows carrying out an unnecessary validation of the WMI repository.  This validation is very time consuming and slows the overall start up and login process down.

A Microsoft hotfix is now available KB 2617858 http://support.microsoft.com/kb/2617858 and should resolve the slow startup by preventing unnecessary validations of the WMI repository.