Eacfilt driver must be bound to active interfaces Realtek RTL8101E Family PCI


  • Hi All,

    I'm trying to connect using Nortel VPN client software(V06_07.27) for Windows Vista Home Premium.
    But I always receive the error message"Eacfilt driver must be bound to active interfaces Realtek RTL8101E Family PCI"
    Tried reinstalling several times,but no luck.Could someone help me out to solve this issue?

    Many Thanks,
    • Moved by Carey FrischMVP, Moderator Wednesday, September 15, 2010 4:50 AM Moved to appropriate forum category (From:Windows Vista Announcements)
    Thursday, April 17, 2008 2:08 PM

All replies


    I am experiencing the same problem.. I appreciate any suggestions.  Thanks!
    Monday, June 23, 2008 7:10 PM
  • hi all,

    I have the same problem. Did somebody figure it out yet.


    Re: Eacfilt driver must be bound to active interfaces
    Sunday, June 29, 2008 11:12 PM
  • I had this problem as well.  Click on Control Panel, Network Connections, then right click on the interface mentioned in the error message (it may be "Local Area Connection" or "Realtek RTL8101E Family PCI" to use your example).  You'll see the Eacfilt Driver with a check box.  Clear the checkbox, and click on OK.  Then repeat the process, this time checking the checkbox.  Click OK again, and now it will work.



    Wednesday, July 23, 2008 3:06 PM
  • Unchecking/Checking did not work for me - anyone else fix this problem?

    Tuesday, July 29, 2008 4:55 PM
  • yes,

    In addition to unchecking and checking, please disable and reenable your LAN connection.  If in doubt, I like to do a full reboot. 


    Thursday, July 31, 2008 10:57 PM
  • Hit the same problem today (October), googled it and found the solution here. Thanks HomeITStaff
    Thursday, October 16, 2008 8:21 AM

    Working on support desk and had a remote user with this issue. Found this thread via google and it fixed our issue


    Thanks HomeITStaff  !

    Tuesday, October 21, 2008 3:56 AM
  • Hi all, I just face this problem and solve it, I tried to check/uncheck the driver in the Network Connection but it doesn't work for me, so what I did was:


    I uninstall Contivity, then I went to the regedit (start>run>regedit) and search for all the entries with the name "eacfilt" and delete all of them.

    Then I went to "c:\windows\system32" and delete the file eactfilt.dll (you can rename if you don't want to lose it)

    After that I reboot and reinstall

    Now everything works fine.


    I tried to unistall/install the Contivity without deleting the files and entries, but doing this it doesn't work, because it doesn't copy the DLL again because is already in the system and is already registered in the Regedit.


    Good luck



    Friday, October 31, 2008 12:44 PM
  • Hi, ı try them both it stil l gives the same resaults and ı could not find each filt dossier in rgedit file.

    Sunday, March 29, 2009 7:23 PM
  • Had a user who was experiencing this issue after a full reinstall of Nortel client.  Found this article via Google and the proposed resolution worked for me.

    Thursday, July 9, 2009 8:32 PM
  • Thank you HomeITStaff!!! Worked like a charm and I didn't have to re-image my laptop. Many thanks.
    Wednesday, September 15, 2010 2:21 AM
  • @HomeITStaff.......

    Worked perfectly...:-)

    Wednesday, March 2, 2011 7:44 AM