Windows 10: why cant my microsoft app open?

Discus and support why cant my microsoft app open? in Microsoft Windows 10 Store to solve the problem; why cant my Microsoft app open? https://answers.microsoft.com/en-us/windows/forum/all/why-cant-my-microsoft-app-open/72b109bb-dbc0-40d4-80fd-21abd45b623d Discussion in 'Microsoft Windows 10 Store' started by Kingsley Uwakwe, Jun 27, 2025.

  1. why cant my microsoft app open?


    why cant my Microsoft app open?

    :)
     
    Kingsley Uwakwe, Jun 27, 2025
    #1
  2. Brink Win User

    Mail app will not open on 10041.

    Hello Adam,

    This is the suggested solution below if you haven't already tried it. why cant my microsoft app open? :)

    In this Windows 10 build 10041, the Mail, Calendar, and People apps may be broken due to a licensing issue with the Store Beta. To get these apps working again, you need to follow these steps:

    • Open powershell as administrator
    • Run the command Get-appxprovisionedpackage –online | where-object {$_.packagename –like “*windowscommunicationsapps*”} | remove-appxprovisionedpackage –online
    • Re-install Mail, People and Calendar from the Store (green tile)
     
    Brink, Jun 27, 2025
    #2
  3. mngerhold Win User
    Can I customize the list of suggest apps in the "Open with" menu?

    Well, I hope this helps the OP - it took a while. I tried 'Default Program Editor' (DPE) and it did indeed add (or remove) items, but when I tried to specifically add Word to pdf opening, it failed - it went through the motions, but nothing happened. So I started again, playing with settings for opening .doc files. This seemed to work: initially in explorer I had 3 programs appear in the 'default' list that pops up on a rt-click>open-with:

    why cant my microsoft app open? 294973d1598623103t-can-i-customize-list-suggest-apps-open-menu-explorer-doc-open-b4-edit.png

    and this is what the relevant bit of the Registry showed:

    why cant my microsoft app open? 294974d1598623158t-can-i-customize-list-suggest-apps-open-menu-regedit-doc-open-b4-edit.png

    Don't ask me why just 3 of those 8 (a to h) programs show up (maybe the 'instant' list is limited to three? - no, see later) - anyway, I used DPE to remove Wordpad from the list: when saving the edit as a REG file, this is what I got:

    Code:
    and the result in Explorer was:

    why cant my microsoft app open? 294976d1598623523t-can-i-customize-list-suggest-apps-open-menu-explorer-doc-open-after-edit.png

    and the registry now shows:

    why cant my microsoft app open? 294977d1598623552t-can-i-customize-list-suggest-apps-open-menu-regedit-doc-open-after-edit.png

    Note how item 'g' from the list has been removed (it seems there is no issue with having a letter missing). I then messed about trying to open a .doc file with various other programs, and they all started to appear in the 'instant' list:

    why cant my microsoft app open? 294978d1598623687t-can-i-customize-list-suggest-apps-open-menu-explorer-doc-open-additions.png


    So I thought 'well, that is easy - just open a pdf once in Word and it should appear'. So back to trying to open PDFs: but however many times I tried, Word would never appear.

    why cant my microsoft app open? 294979d1598623906t-can-i-customize-list-suggest-apps-open-menu-explorer-pdf-open-no-word.png

    even though there were any number of entries in the Registry 'Open With' list, including Word:

    why cant my microsoft app open? 980d1598623968t-can-i-customize-list-suggest-apps-open-menu-regedit-pdf-open-no-word-lots-others.png

    So what did DPE make of this - well, it showed some of the entries:

    why cant my microsoft app open? 294981d1598624067t-can-i-customize-list-suggest-apps-open-menu-dpe-list-pdf-open-some-others.png

    Although Word is shown, it doesn't appear on a rt-click. Its entry can be removed, but that doesn't help. So my attention was drawn to the existence of another folder below 'OpenWithList', namely 'OpenWithProgids', and that contained a specific ref to Sumatra (my preferred program for PDFs). Looking back at the same entry for .docx, I found this:

    why cant my microsoft app open? 294983d1598624540t-can-i-customize-list-suggest-apps-open-menu-regedit-doc-open-docx.png

    so I added an identical Word.Document.12 ref to the list for PDFs:

    why cant my microsoft app open? 294984d1598624610t-can-i-customize-list-suggest-apps-open-menu-regedit-pdf-open-word-progids.png

    I think IrfanView is there as it got added during my experiments! I now get this in Explorer:

    why cant my microsoft app open? 294985d1598624682t-can-i-customize-list-suggest-apps-open-menu-explorer-pdf-open-word.png
    Hurrah! I then tried to use DPE to remove the redundant entries, and got this as a .REG file:
    Code:
    But when i merge that with the registry, the IrfanView item does not get deleted:

    why cant my microsoft app open? d1598625244t-can-i-customize-list-suggest-apps-open-menu-explorer-pdf-open-irfanview-still-there.png

    and as seen in the registry:

    why cant my microsoft app open? 0d1598625265t-can-i-customize-list-suggest-apps-open-menu-regedit-pdf-open-irfanview-still-there.png

    so I deleted it by hand, and at last have the entries I (or rather, the OP) want:

    why cant my microsoft app open? 294991d1598625395t-can-i-customize-list-suggest-apps-open-menu-explorer-pdf-open-i-want.png


    Note that my manually added reg entry is of type Binary', as there seems to be no way to add a value of type 'None'.

    So it seems that DPE cannot cope with entries in the 'Progids' list, and something makes some programs fall into that list, rather than the 'openwithlist'. I am sorry for any typos above, or pictures in the wrong place - can't be bothered to check it too thoroughly. Hope it helps someone!

    atb, Martin
     
    mngerhold, Jun 27, 2025
    #3
  4. Edwin Win User

    why cant my microsoft app open?

    Mail app will not open on 10041.

    Hey Shawn,
    I did that to no avail, then I ran WSReset.exe; now I'm good on all 3, Mail, Calendar and People! *Confused
    Go figure!

    Store Cache - Clear in Windows 8
     
    Edwin, Jun 27, 2025
    #4
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