This is how we can fix "An App default was reset" pop up in Windows 10 [Beginner's guide]

Just follow the video to fix the problem.

The thing you need to copy are as follows..
======================================================

Windows Registry Editor Version 5.00
;Let’s fix
;For Microsoft.3DBuilder
;——————-
;Fixes .stl, .3mf, .obj, .wrl, .ply, .fbx, .3ds, .dae, .dxf, .bmp
;… .jpg, .png, .tga

[HKEY_CURRENT_USERSOFTWAREClassesAppXvhc4p7vz4b485xfp46hhk3fq3grkdgjg]
“NoOpenWith”=””

;For Microsoft Edge
;——————-
;For File Types: .htm, .html
[HKEY_CURRENT_USERSOFTWAREClassesAppX4hxtad77fbk3jkkeerkrm0ze94wjf3s9]
“NoOpenWith”=””

;For File Types: .pdf
[HKEY_CURRENT_USERSOFTWAREClassesAppXd4nrz8ff68srnhf9t5a8sbjyar1cr723]
“NoOpenWith”=””

;For File Types: .svg
[HKEY_CURRENT_USERSOFTWAREClassesAppXde74bfzw9j31bzhcvsrxsyjnhhbq66cs]
“NoOpenWith”=””

;For File Types: .xml
[HKEY_CURRENT_USERSOFTWAREClassesAppXcc58vyzkbjbs4ky0mxrmxf8278rk9b3t]
“NoOpenWith”=””

;For Microsoft Photos
;——————-
;File Types: .3g2,.3gp, .3gp2, .3gpp, .asf, .avi, .m2t, .m2ts, .m4v, .mkv
;… .mov, .mp4, mp4v, .mts, .tif, .tiff, .wmv
[HKEY_CURRENT_USERSOFTWAREClassesAppXk0g4vb8gvt7b93tg50ybcy892pge6jmt]
“NoOpenWith”=””

;For image file types
[HKEY_CURRENT_USERSOFTWAREClassesAppX43hnxtbyyps62jhe9sqpdzxn1790zetc]
“NoOpenWith”=””

;Other File Types: .raw, .rwl, .rw2 and others
[HKEY_CURRENT_USERSOFTWAREClassesAppX9rkaq77s0jzh1tyccadx9ghba15r6t3h]
“NoOpenWith”=””

;For Zune Music App
;——————-
;File Types: .aac, .adt, .adts ,.amr, .flac, .m3u, .m4a, .m4r, .mp3, .mpa
;.. .wav, .wma, .wpl, .zpl
[HKEY_CURRENT_USERSOFTWAREClassesAppXqj98qxeaynz6dv4459ayz6bnqxbyaqcs]
“NoOpenWith”=””

;For Zune Video App
;——————-
;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_USERSOFTWAREClassesAppX6eg8h5sxqq90pv53845wmnbewywdqq5h]
“NoOpenWith”=””

======================================================
Copy,all the lines in between the (===)Symbol.

Credits to all involved in creating the above registry key.

Don’t forget to subscribe if it helped..

Note : you need to reinstall your player to automatically open MKV files,else it will pop up everytime to select an app when you open .MKV files.

Thank you.

source

how to repair windows 10