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Is there a maximum number of Network Filter Drivers in Windows 7?

Answered Is there a maximum number of Network Filter Drivers in Windows 7?

  • Thursday, April 08, 2010 7:50 AM
     
     
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    I recently tried to install Windows XP Mode on my Windows 7 laptop, and experienced a number of failures...

    According to a post elsewhere on this forum (http://social.technet.microsoft.com/Forums/en-GB/w7itprovirt/thread/00c74bd9-da7b-4acb-ae5a-7112377bc7e2), one of the possible causes of this is if the maximum number of network filter drivers is installed - from Thayu:

    "From your logs, the error is 0x8004a029, which basically indicates that the maximum number of network filter drivers has been reached.
    Could you uninstall any other network filter driver that you think is not necessary and try installing VPC again?"

    So, I uninstalled Cisco VPN, and retried the XP Mode installation, which now worked... However, I am now unable to re-install Cisco VPN - presumably for the same reason...

    The software I have installed that seems relevant is:

    • Symantec Endpoint Security
    • Checkpoint VPN-1 SecureClient
    • Microsoft Virtual PC 2007 (XP Mode)

    So, am I right in thinking the maximum number of network filter drivers in Windows 7 is 3??  Is this configurable??

    This is a really worrying limit for me, as I have a number of customers that I have to be able to connect to, requiring both CheckPoint and Cisco VPN software to be installed... I also require XP Mode to connect by VPN to legacy clients that don't support the MS-CHAP2 protocol, and I'd be stupid to run without Anti-virus...

    Any suggestions?

    Nick

     

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  • Wednesday, April 14, 2010 6:51 AM
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    Hi,

     

    Based on my research, I would like to answer you that the maximum number of network filter drivers in Windows 7 is 14. However, it is hard coded to allow 14 filter drivers. By default, the number is 8. To view the number or modify the number, please access the following registry key:

     

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Network\MaxNumFilters

     

    Usually, the network filter drivers are listed in the Network Connection’s Properties. Also, it can be located by some third party programs, such as antivirus program.

     

    Thanks,

    Novak

     
  • Wednesday, February 02, 2011 11:36 PM
     
     
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    Novak - I am not finding this key on my laptop.  What may be the reasons?

     
  • Thursday, April 12, 2012 3:58 PM
     
     
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    Big big thanks for this information.

    First after manual change if this setting to 14 on my machine I was able to install the virtual PC on my Window 7 Professional 64bit. It's a pity, that Microsoft cannot handle it during the installation of the Virtual PC. This costs me hours of work.

    Paul


    • Edited by Paul73D Thursday, April 12, 2012 3:59 PM typo
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  • Thursday, August 30, 2012 1:02 PM
     
     
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    Thanks for this answer.

    I ran into this when trying to install the Cisco 64-bit VPN client. The value in the registry was 8. I changed it to 16 and was able to install the VPN client successfully.