![\"app](\"https:\/\/www.winhelponline.com\/blog\/wp-content\/uploads\/2016\/02\/w10-app-reset-fix.png\")
<\/p>\nThis post explains why Windows 10 resets your file associations for file types supported by modern apps like 3d Builder, Zune music, Zune video (Movies & TV), Microsoft Edge, and Microsoft Edge Chromium.<\/p>\n
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The app defaults are reset by Windows 10 if it finds that an incompatible third-party program making changes to file associations directly, rather than directing users to the Default Apps window.<\/p>\n
Since the UserChoice<\/strong> \u2192 ProgID<\/strong> hash algorithm is in place in Windows 10, incorrect modification of file associations in the registry would cause Windows 10 to reset the association settings to defaults.<\/p>\n In Windows 10, applications must not create or overwrite the {.extension} in the above registry path refers to the file extension. It may be Instead, the application should redirect the user to the Default apps window. This is a major change in Windows 10.<\/p>\n If a (legacy) application doesn’t use Windows API and writes to the registry to set the file associations, Windows 10 detects that the registry (“UserChoice” key) is corrupted and will reset the fail-safe Windows default program for this file extension. The user will see the An App default was reset<\/strong> notification.<\/p>\n After you get the notification, if you open the Event Viewer and go to The .htm file type association was reset in the above example, and Microsoft Edge is now the default handler for the file type. On Windows 10 versions that have Microsoft Edge (Chromium) built-in, then “ Make sure the third-party programs you’re using comply with the rules of Windows 10.<\/p>\n If you’re unsure which program is trying to modify the above registry key, use Process Monitor<\/a> and inspect “UserChoice”<\/strong> entries in the trace. It’s possible that you’re using an outdated version of Adobe Reader DC?<\/p>\n Quoting Microsoft’s Raymond Chen<\/strong><\/p>\n Program X wants to set itself as the user’s preferred handler, but they want to do so without requiring the user to confirm the change. How considerate of them. So they manipulate the registry keys directly. (I bet somebody got a really nice bonus for that feature.) But they are manipulating them the pre-Windows 10 way. This means that Windows 10 detects the settings as corrupted and throws them away, causing the handler to fall back to the system default.<\/em><\/p>\n The customer has a few choices here.<\/p>\n The obvious choice is to stop using Program X. Easier said than done. Program X is probably essential to the customer\u2019s workflow. That\u2019s why they want to set it as the default!<\/p>\n Another option is to work with the vendors who produce Program X and get them to stop mucking around in internal registry keys. (Good luck with that.)<\/p>\n Reference: Why do my PDF file associations get reset every time I restart? | The Old New Thing<\/a><\/em><\/p>\n<\/div>\n In early builds of Windows 10, you can use the registry fix (workaround) below to prevent Windows 10 from resetting file associations.<\/p>\n We saw how to stop Microsoft Edge<\/a> and Photos<\/a> from resetting your file association settings. Based on the same, I thought of implementing the registry edit for all<\/b> the Metro apps (or Universal Windows Apps) such as 3d Builder, Zune music, Zune video (Movies & TV).<\/p>\n For v1607 and earlier<\/strong><\/p>\n On early builds of Windows 10, 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 file types, without impeding the Apps functionality in any way. To reverse the changes, run the undo REG file. The registry fix was tested up to Windows 10 v1607.<\/p>\n [Download REG file – w10_stop_reset_fileasso.zip<\/b><\/a>] Contents of this REG file are below.<\/p>\n After running the REG fix, click Start \u2192 Settings \u2192 Default apps and set file associations or default apps. 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.<\/p>\n Note that this registry edit also hides the modern apps in Open with<\/strong> dialog, but they still appear in Settings \u2192 Default apps<\/strong>.<\/p>\n June 01, 2016: If using a local account, try switching to Microsoft account<\/u>, as this helped some users. If you don’t want to switch to Microsoft account, try Fix #2 in the article Unable to Set Default File Association Using Default Apps in Windows 10<\/a>. (Ignore the page title)<\/i><\/p>\n Feb 25, 2016: In Windows 10, to configure your default apps, click the Start button, Settings, System, and then Default apps. This is the only supported method to manually change your default app settings. We\u2019ve 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<\/a>. 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\u2019t be corrupted, and those user settings are retained. Source<\/a> – Betsy [MSFT]<\/i><\/p>\nProgID<\/code><\/strong> value in the following registry key directly:<\/p>\nHKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\FileExts\\{.extension}\\UserChoice<\/pre>\n.htm<\/code>, .html<\/code>, .pdf<\/code> etc.<\/em><\/p>\nMicrosoft-Windows-Shell-Core\/AppDefaults<\/code> event log, you’ll see which file type association was recently reset.<\/p>\n\n
eventvwr.msc<\/code>)<\/li>\n62441<\/code>.
\n![\"app](\"https:\/\/www.winhelponline.com\/blog\/wp-content\/uploads\/2016\/02\/app-default-reset-event-log.png\")
<\/p>\nLog Name: Microsoft-Windows-Shell-Core\/AppDefaults\r\nSource: Microsoft-Windows-Shell-Core\r\nDate:\u00a0\r\nEvent ID: 62441\r\nTask Category: (62441)\r\nLevel: Information\r\nKeywords: \r\nUser: DESKTOP-JKJ4G5Q\\ramesh\r\nComputer: DESKTOP-JKJ4G5Q\r\nDescription:\r\nUser choice has been reset to prog id AppX4hxtad77fbk3jkkeerkrm0ze94wjf3s9 for .htm<\/pre>\n<\/li>\n<\/ul>\n
AppX4hxtad77fbk3jkkeerkrm0ze94wjf3s9<\/code> is the Microsoft Edge ProgID for .htm\/.html files, as seen in the registry.<\/p>\nMSEdgePDF<\/code>” ProgID will be the default handler for PDF files.<\/p>\nSolution<\/h2>\n
The ultimate fix would be to upgrade the 3rd party program (viewer, browser, or anything) and make sure that it is compatible with Windows 10.<\/h4>\n
![\"\"](\"https:\/\/www.winhelponline.com\/blog\/wp-content\/uploads\/2016\/08\/information-icon.png\"){kind=icon}
If your programs are already updated (and Windows 10-compatible), and yet this error occurs, please send your query here<\/a>. You need to find out which program is corrupting the UserChoice<\/code> data in the registry.<\/p>\n\n
\nWorkaround<\/h3>\n
Update [2019]<\/strong>: The following registry fix doesn’t work in Windows 10 v1809. Although the registry values are in place, Windows 10 relentlessly resets the file association if the UserChoice key is written (and corrupted) by a third-party program.<\/h4>\n
\nPLEASE DO NOT USE THIS REGISTRY FILE ON WINDOWS 11, as it will cause file association issues<\/a> with Default Apps (on Windows 11).<\/h4>\n
Windows Registry Editor Version 5.00\r\n\r\n;Description: Prevents Windows 10 from resetting the file associations\r\n;... by adding NoOpenWith & NoStaticDefaultVerb values for all the modern apps.\r\n;Created on Feb 13 2016 by Ramesh Srinivasan\r\n;Updated on May 01 2019\r\n;The Winhelponline Blog\r\n;https:\/\/www.winhelponline.com\/blog\r\n;Tested in Windows 10 v1511 & 1607\r\n\r\n;-------------------\r\n;Microsoft.3DBuilder\r\n;-------------------\r\n;File Types: .stl, .3mf, .obj, .wrl, .ply, .fbx, .3ds, .dae, .dxf, .bmp\r\n;... .jpg, .png, .tga\r\n[HKEY_CURRENT_USER\\SOFTWARE\\Classes\\AppXvhc4p7vz4b485xfp46hhk3fq3grkdgjg]\r\n\"NoOpenWith\"=\"\"\r\n\"NoStaticDefaultVerb\"=\"\"\r\n\r\n;-------------------\r\n;Microsoft Edge\r\n;-------------------\r\n;File Types: .htm, .html\r\n[HKEY_CURRENT_USER\\SOFTWARE\\Classes\\AppX4hxtad77fbk3jkkeerkrm0ze94wjf3s9]\r\n\"NoOpenWith\"=\"\"\r\n\"NoStaticDefaultVerb\"=\"\"\r\n\r\n;File Types: .pdf\r\n[HKEY_CURRENT_USER\\SOFTWARE\\Classes\\AppXd4nrz8ff68srnhf9t5a8sbjyar1cr723]\r\n\"NoOpenWith\"=\"\"\r\n\"NoStaticDefaultVerb\"=\"\"\r\n\r\n;File Types: .svg\r\n[HKEY_CURRENT_USER\\SOFTWARE\\Classes\\AppXde74bfzw9j31bzhcvsrxsyjnhhbq66cs]\r\n\"NoOpenWith\"=\"\"\r\n\"NoStaticDefaultVerb\"=\"\"\r\n\r\n;File Types: .xml\r\n[HKEY_CURRENT_USER\\SOFTWARE\\Classes\\AppXcc58vyzkbjbs4ky0mxrmxf8278rk9b3t]\r\n\"NoOpenWith\"=\"\"\r\n\"NoStaticDefaultVerb\"=\"\"\r\n\r\n;-------------------\r\n;Microsoft Photos\r\n;-------------------\r\n;File Types: .3g2,.3gp, .3gp2, .3gpp, .asf, .avi, .m2t, .m2ts, .m4v, .mkv\r\n;... .mov, .mp4, mp4v, .mts, .tif, .tiff, .wmv\r\n[HKEY_CURRENT_USER\\SOFTWARE\\Classes\\AppXk0g4vb8gvt7b93tg50ybcy892pge6jmt]\r\n\"NoOpenWith\"=\"\"\r\n\"NoStaticDefaultVerb\"=\"\"\r\n\r\n;File Types: Most Image File Types\r\n[HKEY_CURRENT_USER\\SOFTWARE\\Classes\\AppX43hnxtbyyps62jhe9sqpdzxn1790zetc]\r\n\"NoOpenWith\"=\"\"\r\n\"NoStaticDefaultVerb\"=\"\"\r\n\r\n;File Types: .raw, .rwl, .rw2 and others\r\n[HKEY_CURRENT_USER\\SOFTWARE\\Classes\\AppX9rkaq77s0jzh1tyccadx9ghba15r6t3h]\r\n\"NoOpenWith\"=\"\"\r\n\"NoStaticDefaultVerb\"=\"\"\r\n\r\n;-------------------\r\n; Zune Music\r\n;-------------------\r\n;File Types: .aac, .adt, .adts ,.amr, .flac, .m3u, .m4a, .m4r, .mp3, .mpa\r\n;.. .wav, .wma, .wpl, .zpl\r\n[HKEY_CURRENT_USER\\SOFTWARE\\Classes\\AppXqj98qxeaynz6dv4459ayz6bnqxbyaqcs]\r\n\"NoOpenWith\"=\"\"\r\n\"NoStaticDefaultVerb\"=\"\"\r\n\r\n;-------------------\r\n; Zune Video\r\n;-------------------\r\n;File Types: .3g2,.3gp, .3gpp, .avi, .divx, .m2t, .m2ts, .m4v, .mkv, .mod\r\n;... .mov, .mp4, mp4v, .mpe, .mpeg, .mpg, .mpv2, .mts, .tod, .ts\r\n;... .tts, .wm, .wmv, .xvid\r\n[HKEY_CURRENT_USER\\SOFTWARE\\Classes\\AppX6eg8h5sxqq90pv53845wmnbewywdqq5h]\r\n\"NoOpenWith\"=\"\"\r\n\"NoStaticDefaultVerb\"=\"\"\r\n<\/pre>\n
Updates<\/h2>\n