How to Fix: 'An app default was reset' Non-Stop Popup Notifications

Infopackets Reader Stephen B. writes:

" Dear Dennis,

I recently installed 'Ace Player HD' to play p2p video streaming. Everything was fine for a little while, but now Windows 10 keeps popping up every few seconds saying that 'An app default was reset. An app caused a problem with the default app setting for .3gp files, so it was reset to Moves & TV.' The same message appears for different file associations, and then it starts over and goes in a loop. I can't make these notifications stop and it is driving me CRAZY! Please help! "

My response:

I asked Stephen if he would like me to connect to his system using my remote desktop support service, and he agreed.

In Windows 10 there is a new "Action Center," with notifications that appear in the lower right hand corner near the clock - similar to this, depicting 'An app default was reset' (picture).

The problem on Stephen's computer was that these notifications were popping up every 3 seconds or so, with no end in sight. After a bit of research I came across a registry fix that resets file associations for commonly used file types in Windows 10. I decided to give it a try, and it immediately fixed the problem. I then converted the fix into a Windows command batch file, to make it easy to execute.

How to Fix: 'An app default was reset' Non-Stop Popup Notifications

Below I'll explain how to fix "An app default was reset" if you are plagued with these error messages.

For the record, the following file type associations will be reset: .3ds, .3g2, .3gp, .3gp2, .3gpp, .3mf, .aac, .adt, .adts, .amr, .asf, .avi, .bmp, .dae, .divx, .dxf, .fbx, .flac, .htm, .html, .jpg, .m2t, .m2ts, .m3u, .m4a, .m4v, .mkv, .mod, .mov, .mp3, .mp4, .mp4, .mp4v, .mp4v, .mpa, .mpe, .mpeg, .mpg, .mpv2, .mts, .obj, .pdf, .ply, .png, .raw, .rw2, .rwl, .stl, .svg, .tga, .tif, .tiff, .tod, .ts, .tts, .wav, .wm, .wma, .wmv, .wpl, .wrl, .xml, .xvid, and .zpl.

1. Click Start, then type in "cmd" (no quotes); wait for "CMD.EXE" or "Command Prompt" to appear in the list, then right click it and select "Run as Administrator".
    
2. Highlight the text below using your mouse:
   
   reg add "HKEY_CURRENT_USER\SOFTWARE\Classes\AppXvhc4p7vz4b485xfp46hhk3fq3grkdgjg" /v "NoOpenWith" /t REG_SZ /d "" /f
   reg add "HKEY_CURRENT_USER\SOFTWARE\Classes\AppXvhc4p7vz4b485xfp46hhk3fq3grkdgjg" /v "NoStaticDefaultVerb" /t REG_SZ /d "" /f
   reg add "HKEY_CURRENT_USER\SOFTWARE\Classes\AppX4hxtad77fbk3jkkeerkrm0ze94wjf3s9" /v "NoOpenWith" /t REG_SZ /d "" /f
   reg add "HKEY_CURRENT_USER\SOFTWARE\Classes\AppX4hxtad77fbk3jkkeerkrm0ze94wjf3s9" /v "NoStaticDefaultVerb" /t REG_SZ /d "" /f
   reg add "HKEY_CURRENT_USER\SOFTWARE\Classes\AppXd4nrz8ff68srnhf9t5a8sbjyar1cr723" /v "NoOpenWith" /t REG_SZ /d "" /f
   reg add "HKEY_CURRENT_USER\SOFTWARE\Classes\AppXd4nrz8ff68srnhf9t5a8sbjyar1cr723" /v "NoStaticDefaultVerb" /t REG_SZ /d "" /f
   reg add "HKEY_CURRENT_USER\SOFTWARE\Classes\AppXde74bfzw9j31bzhcvsrxsyjnhhbq66cs" /v "NoOpenWith" /t REG_SZ /d "" /f
   reg add "HKEY_CURRENT_USER\SOFTWARE\Classes\AppXde74bfzw9j31bzhcvsrxsyjnhhbq66cs" /v "NoStaticDefaultVerb" /t REG_SZ /d "" /f
   reg add "HKEY_CURRENT_USER\SOFTWARE\Classes\AppXcc58vyzkbjbs4ky0mxrmxf8278rk9b3t" /v "NoOpenWith" /t REG_SZ /d "" /f
   reg add "HKEY_CURRENT_USER\SOFTWARE\Classes\AppXcc58vyzkbjbs4ky0mxrmxf8278rk9b3t" /v "NoStaticDefaultVerb" /t REG_SZ /d "" /f
   reg add "HKEY_CURRENT_USER\SOFTWARE\Classes\AppXk0g4vb8gvt7b93tg50ybcy892pge6jmt" /v "NoOpenWith" /t REG_SZ /d "" /f
   reg add "HKEY_CURRENT_USER\SOFTWARE\Classes\AppXk0g4vb8gvt7b93tg50ybcy892pge6jmt" /v "NoStaticDefaultVerb" /t REG_SZ /d "" /f
   reg add "HKEY_CURRENT_USER\SOFTWARE\Classes\AppX43hnxtbyyps62jhe9sqpdzxn1790zetc" /v "NoOpenWith" /t REG_SZ /d "" /f
   reg add "HKEY_CURRENT_USER\SOFTWARE\Classes\AppX43hnxtbyyps62jhe9sqpdzxn1790zetc" /v "NoStaticDefaultVerb" /t REG_SZ /d "" /f
   reg add "HKEY_CURRENT_USER\SOFTWARE\Classes\AppX9rkaq77s0jzh1tyccadx9ghba15r6t3h" /v "NoOpenWith" /t REG_SZ /d "" /f
   reg add "HKEY_CURRENT_USER\SOFTWARE\Classes\AppX9rkaq77s0jzh1tyccadx9ghba15r6t3h" /v "NoStaticDefaultVerb" /t REG_SZ /d "" /f
   reg add "HKEY_CURRENT_USER\SOFTWARE\Classes\AppXqj98qxeaynz6dv4459ayz6bnqxbyaqcs" /v "NoOpenWith" /t REG_SZ /d "" /f
   reg add "HKEY_CURRENT_USER\SOFTWARE\Classes\AppXqj98qxeaynz6dv4459ayz6bnqxbyaqcs" /v "NoStaticDefaultVerb" /t REG_SZ /d "" /f
   reg add "HKEY_CURRENT_USER\SOFTWARE\Classes\AppX6eg8h5sxqq90pv53845wmnbewywdqq5h" /v "NoOpenWith" /t REG_SZ /d "" /f
   reg add "HKEY_CURRENT_USER\SOFTWARE\Classes\AppX6eg8h5sxqq90pv53845wmnbewywdqq5h" /v "NoStaticDefaultVerb" /t REG_SZ /d "" /f
   echo this is a dummy line
    
3. Right click the above highlighted text, then select "Copy" from the dialogue menu.
    
4. Go to the administrative command prompt you opened in Step #1 above, then right click in the middle of the window and select "Paste" from the dialogue menu. The text you copied in Step #2 should now be output to the command line, and the highly annoying "An app default was reset" error messages should stop.

I hope that helps!

Additional 1-on-1 Support: From Dennis

If you are still experiencing "An app default was reset" error messages and the above fix didn't help - there may be something else wrong with your system. In that case you are welcome to contact me for additional support using my remote desktop support service. Simply contact me, briefly describing the issue and I will get back to you as soon as possible.

Got a Computer Question or Problem? Ask Dennis!

I need more computer questions. If you have a computer question -- or even a computer problem that needs fixing -- please email me with your question so that I can write more articles like this one. I can't promise I'll respond to all the messages I receive (depending on the volume), but I'll do my best.

About the author: Dennis Faas is the owner and operator of Infopackets.com. With over 30 years of computing experience, Dennis' areas of expertise are a broad range and include PC hardware, Microsoft Windows, Linux, network administration, and virtualization. Dennis holds a Bachelors degree in Computer Science (1999) and has authored 6 books on the topics of MS Windows and PC Security. If you like the advice you received on this page, please up-vote / Like this page and share it with friends. For technical support inquiries, Dennis can be reached via Live chat online this site using the Zopim Chat service (currently located at the bottom left of the screen); optionally, you can contact Dennis through the website contact form.