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Fix for “An App Default was Reset” Windows 10 Resetting File Associations (Registry Fixes)

We saw how to stop Microsoft Edge and Photos from resetting your file association settings. Based on the same, I thought of implementing the registry edit for all the Metro apps (or Universal Windows Apps) such as 3d Builder, Zune music, Zune video (Movies & TV).

Note: The app reset is usually triggered when a 3rd party program changes file associations in an incorrect way, instead of directing users to the Default Apps or Default Programs window. Since the hash algorithm is in place, incorrect modification of file associations in the registry would cause Windows 10 to reset the associations settings to Windows defaults.

The ultimate fix would be to upgrade the 3rd program (viewer, browser or anything) you’re using and make sure it’s compatible with Windows 10. If that doesn’t help and Windows 10 continues to reset the associations, then use the registry fix below.

Running the registry edit below stops Microsoft Edge, Photos, 3d Builder, Zune music and Zune Video (Movies & TV) from taking over your file associations for various files types, without impeding the Apps functionality in any way. To reverse the changes, simply run the undo REG file.

[Download REG file – w10_stop_reset_fileasso.zip] Contents of this REG file are below.

Windows Registry Editor Version 5.00

;Description: Prevents Windows 10 from resetting the file associations
;... by adding NoOpenWith & NoStaticDefaultVerb values for all the modern apps.
;Created on Feb 13 2016 by Ramesh Srinivasan
;Updated on Sep 28 2016
;The Winhelponline Blog
;https://www.winhelponline.com/blog
;Tested in Windows 10 v1511 & 1607

;-------------------
;Microsoft.3DBuilder
;-------------------
;File Types: .stl, .3mf, .obj, .wrl, .ply, .fbx, .3ds, .dae, .dxf, .bmp
;... .jpg, .png, .tga
[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"=""

After running the REG fix, open Control Panel – Default Programs and set file associations or default programs. None of the built-in Universal Apps should reset the associations from now on. This method has been tested (and works fine) in Windows 10 v1511 and 1607.

Note that this registry edit also hides the Modern Apps in Open with dialog boxes, but they still appear in the Control Panel – Default Programs.

Updates

June 01, 2016: If using a local account, try switching to Microsoft account, as this helped some users. If you don’t want to switch to Microsoft account, try the Fix #2 in article Unable to Set Default File Association Using Default Apps in Windows 10. (Ignore the page title)

Feb 25 2016: In Windows 10, to configure your default apps, click Start button, Settings, System and then Default apps. This is the only supported method to manually change your default app settings. We’ve seen behavior by some apps that have set themselves as default in unsupported ways by deleting or corrupting registry settings. Details on supported methods for apps to register file associations can be found on MSDN here. Update KB3135173 for Windows addresses the problem and resets application defaults to the initial Windows settings when registry settings are deleted or corrupted. We have worked with some of these app providers so the apps no longer exhibit this behavior in their latest versions. If a user proactively changes their default app settings using the supported method, the registry won’t be corrupted and those user settings are retained. Source – Betsy [MSFT]

Feb 17 2016: This page was mentioned recently by InfoWorld, gHacks, RedmondMag, WinZip and others.