How to fix the error : An app default was reset on Windows 10

You may get the status message “An app default was reset” along with additional information “An app caused a problem with the default app setting for xxx files, so it was reset to …”.

Basically, its default associated file type is reset to the built-in Windows application instead of the one you set.

Note: The fix will exclude Windows applications that integrate Microsoft Edge, Photos, 3D Builder, Zune Music and Zune Video from the list in the Open with dialog box.

Here are the steps to fix the error : An app default was reset on Windows 10 :

1. Follow step 2 (for repair) or step 3 (undo repair) below for what you want to do.

2. To fix the error “An app default was reset” , download this file and go to step 4 below.

(The content of the .reg file for reference)

Windows Registry Editor Version 5.00
; Microsoft.3DBuilder
;File Types: .3ds, .3mf, .bmp, .dae, .dxf, .fbx, .jpg, .obj, .ply, .png, .stl, .tga, .wrl
[HKEY_CURRENT_USER\SOFTWARE\Classes\AppXvhc4p7vz4b485xfp46hhk3fq3grkdgjg]
“NoOpenWith”=””
“NoStaticDefaultVerb”=””

; Microsoft Edge
;File Types: .htm, .html
[HKEY_CURRENT_USER\SOFTWARE\Classes\AppX4hxtad77fbk3jkkeerkrm0ze94wjf3s9]
“NoOpenWith”=””
“NoStaticDefaultVerb”=””

;File Types: .pdf
[HKEY_CURRENT_USER\SOFTWARE\Classes\AppXd4nrz8ff68srnhf9t5a8sbjyar1cr723]
“NoOpenWith”=””
“NoStaticDefaultVerb”=””

;File Types: .svg
[HKEY_CURRENT_USER\SOFTWARE\Classes\AppXde74bfzw9j31bzhcvsrxsyjnhhbq66cs]
“NoOpenWith”=””
“NoStaticDefaultVerb”=””

;File Types: .xml
[HKEY_CURRENT_USER\SOFTWARE\Classes\AppXcc58vyzkbjbs4ky0mxrmxf8278rk9b3t]
“NoOpenWith”=””
“NoStaticDefaultVerb”=””

; Microsoft Photos
;File Types: .3g2,.3gp, .3gp2, .3gpp, .asf, .avi, .m2t, .m2ts, .m4v, .mkv, mov, .mp4, mp4v, .mts, .tif, .tiff, .wmv
[HKEY_CURRENT_USER\SOFTWARE\Classes\AppXk0g4vb8gvt7b93tg50ybcy892pge6jmt]
“NoOpenWith”=””
“NoStaticDefaultVerb”=””

;File Types: Most Image File Types
[HKEY_CURRENT_USER\SOFTWARE\Classes\AppX43hnxtbyyps62jhe9sqpdzxn1790zetc]
“NoOpenWith”=””
“NoStaticDefaultVerb”=””

;File Types: .raw, .rwl, .rw2 and others
[HKEY_CURRENT_USER\SOFTWARE\Classes\AppX9rkaq77s0jzh1tyccadx9ghba15r6t3h]
“NoOpenWith”=””
“NoStaticDefaultVerb”=””

; Zune Music
;File Types: .aac, .adt, .adts ,.amr, .flac, .m3u, .m4a, .m4r, .mp3, .mpa, .wav, .wma, .wpl, .zpl
[HKEY_CURRENT_USER\SOFTWARE\Classes\AppXqj98qxeaynz6dv4459ayz6bnqxbyaqcs]
“NoOpenWith”=””
“NoStaticDefaultVerb”=””

; Zune Video
;File Types: .3g2,.3gp, .3gpp, .avi, .divx, .m2t, .m2ts, .m4v, .mkv, .mod, .mov, .mp4, mp4v, .mpe, .mpeg, .mpg, .mpv2, .mts, .tod, .ts, .tts, .wm, .wmv, .xvid
[HKEY_CURRENT_USER\SOFTWARE\Classes\AppX6eg8h5sxqq90pv53845wmnbewywdqq5h]
“NoOpenWith”=””
“NoStaticDefaultVerb”=””

3. To undo the error “An app default was reset“, download this file and go to step 4 below.

(The content of the .reg file for reference)

Windows Registry Editor Version 5.00

; Microsoft.3DBuilder
;File Types: .3ds, .3mf, .bmp, .dae, .dxf, .fbx, .jpg, .obj, .ply, .png, .stl, .tga, .wrl
[HKEY_CURRENT_USER\SOFTWARE\Classes\AppXvhc4p7vz4b485xfp46hhk3fq3grkdgjg]
“NoOpenWith”=-
“NoStaticDefaultVerb”=-

; Microsoft Edge
;File Types: .htm, .html
[HKEY_CURRENT_USER\SOFTWARE\Classes\AppX4hxtad77fbk3jkkeerkrm0ze94wjf3s9]
“NoOpenWith”=-
“NoStaticDefaultVerb”=-

;File Types: .pdf
[HKEY_CURRENT_USER\SOFTWARE\Classes\AppXd4nrz8ff68srnhf9t5a8sbjyar1cr723]
“NoOpenWith”=-
“NoStaticDefaultVerb”=-

;File Types: .svg
[HKEY_CURRENT_USER\SOFTWARE\Classes\AppXde74bfzw9j31bzhcvsrxsyjnhhbq66cs]
“NoOpenWith”=-
“NoStaticDefaultVerb”=-

;File Types: .xml
[HKEY_CURRENT_USER\SOFTWARE\Classes\AppXcc58vyzkbjbs4ky0mxrmxf8278rk9b3t]
“NoOpenWith”=-
“NoStaticDefaultVerb”=-

; Microsoft Photos
;File Types: .3g2,.3gp, .3gp2, .3gpp, .asf, .avi, .m2t, .m2ts, .m4v, .mkv, mov, .mp4, mp4v, .mts, .tif, .tiff, .wmv
[HKEY_CURRENT_USER\SOFTWARE\Classes\AppXk0g4vb8gvt7b93tg50ybcy892pge6jmt]
“NoOpenWith”=-
“NoStaticDefaultVerb”=-

;File Types: Most Image File Types
[HKEY_CURRENT_USER\SOFTWARE\Classes\AppX43hnxtbyyps62jhe9sqpdzxn1790zetc]
“NoOpenWith”=-
“NoStaticDefaultVerb”=-

;File Types: .raw, .rwl, .rw2 and others
[HKEY_CURRENT_USER\SOFTWARE\Classes\AppX9rkaq77s0jzh1tyccadx9ghba15r6t3h]
“NoOpenWith”=-
“NoStaticDefaultVerb”=-

; Zune Music
;File Types: .aac, .adt, .adts ,.amr, .flac, .m3u, .m4a, .m4r, .mp3, .mpa, .wav, .wma, .wpl, .zpl
[HKEY_CURRENT_USER\SOFTWARE\Classes\AppXqj98qxeaynz6dv4459ayz6bnqxbyaqcs]
“NoOpenWith”=-
“NoStaticDefaultVerb”=-

; Zune Video
;File Types: .3g2,.3gp, .3gpp, .avi, .divx, .m2t, .m2ts, .m4v, .mkv, .mod, .mov, .mp4, mp4v, .mpe, .mpeg, .mpg, .mpv2, .mts, .tod, .ts, .tts, .wm, .wmv, .xvid
[HKEY_CURRENT_USER\SOFTWARE\Classes\AppX6eg8h5sxqq90pv53845wmnbewywdqq5h]
“NoOpenWith”=-
“NoStaticDefaultVerb”=-

4. Save the .reg file to your desktop.

5. Double click on the file download .reg to merge it.

6. When prompted, click Run> Yes (UAC)> Yes> OK to approve the merge it.

7. Now, You can delete the file download if you like.