Invalid Update Control CTF File Error With AVG Anti Virus 8.0

You Might encounter Invalid Update Control CTF File Error when updating AVG Anti Virus 8.0, myself though on both windows xp and Windows Vista operating systems. Here is how I solved the invalid Update Control CTF File Error.

First you need to unhide the hidden files from from windows explorer, Tools-Folder Options-View-Select Show Hidden Files and folders radio button and click on apply and ok.

When you are done with that you just need to remove the CTF temp files in C:\Documents and Settings\All Users\Application Data\Avg8\update\download folder.

Or simple copy this line in red C:\Documents and Settings\All Users\Application Data\Avg8\update\download and paste in My Computer Address bar and delete the .ctf files to resolve the issue.(make sure your operating system is in C drive or change the drive where it is located)

Make sure you don't delete all the .bin files in there unless you want to re-run all updates since your original installation (reinstallation seems to cause a problem in IEs Link Scanner which causes IE to Crash). Only the avginfo files that end with .ctf

For those using windows vista and getting this Error Invalid Update Control CTF File, you just need delete the .ctf files from the following location C:\ProgramData\avg8\update\download.

Windows Vista: C:\ProgramData\avg8\update\download,Find the avginfoavi.ctf and avginfowin.ctf files and delete them, this will fix Invalid Update Control CTF File Error In Windows Vista, or Download the utility from the link deleteupdatefiles and run, this should automatically remove the CTF Files.

Its as simple as that, just deleting the invalid ctf files does the trick, Wish happy Avg Anti virus 8.0 updates ahead, check out other free and great products at AVG AntiVirus AVG Internet Security,AVG Anti-Virus plus Firewall



  1. this is amazing trick, this solved my problem..i am able to update with no errors now!! thanks for the awesome solution.

  2. worked straight away, thankyou

  3. I am using windows vista, ecountered the nvalid Update Control CTF File Error while updating my avg antivirus, the above solution worked!! thanks for the author.

  4. I can't find the program data in windows vista..where should I look for figure out invalid Update Control CTF File Error in windows vista operating system.Please help!!

  5. By default the program data is hidden, you need to enable show hidden files and folders in windows vista. follow the below steps to show hidden file in windows vista, then check for program data in vista drive.

    1. Click the start button
    2. Click Control Panel
    3. Click Folder Options
    4. Click the View tab
    5. Click Show hidden files and folders
    6. If you want to see system files as well, unclick Hide protected operating system files (Recommended)
    7. Click OK

    simple follow the rest of the post
    hopefully that should resolve invalid Update Control CTF File Error

  6. Great advice. Thanks.

  7. very good advice, thank q very much


  8. I have deleted the .ctf files but still the update still not working.Then tried to uninstall and reinstalled the avg and again I could not update on my xp.

    Any suggestion or recomendation for the reliable free av?



  9. this worked like a charm!..using windows vista.Thanks!!

  10. I thought of this and tried it myself when the problem first occurred, but apparently the CTF on the web site was bad, because it reoccured. I went looking for resolutions today and found your link and tried deleting the CTF file again and this time it worked. So... if this doesn't work for you, wait a few hours, then try the whole thing again.

  11. wow
    works very well
    thank you so much ^^

  12. I am delighted to let you know that your steps resolved Invalid Update Control CTF File Error in windows vista. thanks Once again!

  13. thanks..... my sister nearly want to format her com because of this problem....

  14. your solution helped me fixing the invalid Update Control CTF File Error in windows vista.Thanks a ton!

  15. Its really works! Updated straight away without any problems! Thank u!

  16. this is one reason why the internet was invented. quick, easy and reliable help.
    cheers guys.

  17. I have window's xp and i tried searching for the files and i couldn't find them. I assume they are hidden, but where? Can anyone help.

  18. Enable include hidden files while searching using Search in windows xp, also unhide the hidden files from from windows explorer, Tools-Folder Options-View-Select Show Hidden Files and folders radio button and click on apply and ok.

  19. marianne from philippinesJanuary 14, 2009 at 10:33 AM

    what can i say, it's amazing. just a click and your update will run normally. i'm using vista anyway.


    marianne from philippines

  20. Excellent! Worked first pop! Thanks heaps

  21. Thanks a million. I feel better now that the exclamation mark has gone from the AVG icon.

  22. Another problem occurred. I am being prompted by another message that: The connection with the update server has failed; while i am connected to the internet. Please help.

  23. I encoundered the same issue, here is some useful information from avg

    Update failed, Connection with update server has failed is displayed, it can be caused by one of the following reasons:

    In case you are using any Firewall or Content filtering applicaiton, please make sure that it is not preventing AVG Free from connecting to Internet.

    our Internet connection is not fully functional
    Your Internet connection to AVG Free update servers may stop working in some cases, although standard Internet browsing works correctly. Proceed as follows to rectify such situation:

    Open menu Start -> (Settings) -> Control Panel.
    Double-click on Network connections.
    Right-click on Local area connection and select Repair.
    Try to update AVG Free.

    Your Internet settings are not correct
    Even if your Internet connection is working correctly, incorrect DNS servers may be filled in, affecting AVG Free update. This can be caused e.g. by some virus that was previously on your computer.

    Open menu Start -> (Settings) -> Control Panel.
    Double-click on Network connections.
    Right-click on the connection you are using and choose Properties.
    Double-click on Internet Protocol (TCP/IP) item on the General tab.
    Please check (and modify if necessary) the settings of IP address and DNS servers according to your Internet Provider settings or choose the Obtain DNS server address automatically option.
    Confirm the settings by clicking on the OK button.
    Close the window.

    You are using dial-up connection
    In case you are using dial-up connection, you should configure AVG Free to use this connection.

    Open AVG Free by double-click on AVG Free icon your Desktop, or in system tray.
    Open menu Tools -> Advanced settings -> Update -> Dial-up.
    Tick the option Use dial-up connections.
    Save the settings using OK button and try to update again.

  24. Thanks for the solution. I looked at many other websites all telling me to look for ctf files ans to search through the computer, NOTHING worked!!!

    Simple solution to reset my IP address (in the network connections section on the tool bar) worked first time!!!!

    Thank you!!!

  25. it didn.t work

  26. Hi, every one there, jenny, MS Security Essentials? No way, I had removed it from my laptop and also had to use restore my laptop to go back to before, I installed it and it automatically cause it turned on for automatic updates without my permission, and somehow the MS Security Essentials still keeps turning on automatic updates even after the restore. Screw MS Security Essentials, those a-holes, now I have to reformat.