Windows 10 Store stuck in loading screen without end

You have covered most of the store trouble shooting steps. Try the process again, using these instructions. Specifically, run the WSRESET.exe at least 5 times

HOW TO FIX WIN10 STORE APP / METRO / UNIVERSAL APPLICATIONS – WINDOWS STORE RESET

2016 07 19- 5 TIPS TO FIX WINDOWS STORE AND APP ISSUES IN WINDOWS 10
https://www.makeuseof.com/tag/5-tips-fix-window...
1. Win Store Trouble Shooter
2. Clear store Cache (WSReset.exe)
3. Reset Windows update (use the tool in the following link)
4. Reg hack for Connection errors
5. Re-Register the Store

Here are some additional instructions for the 5 tips defined in the article above
#1 MS DOWNLOADABLE WIN10 STORE APP TROUBLE SHOOTER
http://aka.ms/diag_apps10

https://support.microsoft.com/en-us/help/402749... shooter-for-windows-apps

Note: both of these links above should take you to download the same diagnosis “CAB” file.

Use the built in Trouble shooter

Go to Settings > Update & security > Troubleshoot
Scroll down to the bottom
Click Windows Store Apps

#2 WSRESET.EXE – CLEAR AND RESET STORE CACHE
http://www.intowindows.com/how-to-clear-reset-w...

Run as Admin.

Be sure to run the WSReset (Windows Store Reset) program several times. It appears to fix one problem per run, SLOWLY working thorough multiple problems in subsequent runs. Unfortunately the tool is poorly written so it gives the user no indication of what it is doing or if it was successful or not. All you can do is run it several times in the hope that you run it often enough for it to clear all of the problems.

#3 MANUAL RESET WINDOWS UPDATE SUBSYSTEM
the problems remain, you have to revert to a manual process to reset Windows Update
Check that System Restore is turned on and configured
https://www.pcworld.com/article/2955023/windows...
https://www.tekrevue.com/how-to-enable-system-r...

Create a System restore point. (https://support.microsoft.com/en-us/help/402753... )
Use the following process to effectively delete the folders used by Windows Update:

Follow the instructions in this page: https://support.microsoft.com/en-us/help/971058... - How do I reset Windows Update components? (Win7-Win10)

The above process includes a link to the Windows update troubleshooter. Make sure to run through it also.

https://www.youtube.com/watch?v=Y6eHDtylDYo How to Fix Win Update Errors
This is a Video of manual process very similar process to the one described in the link to KB971058 (above)


After doing the process in the above link, including restarting the computer Check for outstanding updates:
. – in start menu search for Windows Update
. - click on “Check for Updates”
. – updates are often sequention, they require an earlier one to be present before being installed. So you should repeat checking for updates until you get no more updates

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https://gallery.technet.microsoft.com/Reset-Win... tool made by MS for XP up to Win10 Creator. Altertnate Windows Update Reset tool to the process in KB 971058.

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RE-INSTALL ALL STORE APPS USING POWERSHELL

…* In the Start Menu, search for PowerShell
…* right click and select "Run as Administrator" option.
…* Enter the following commands one by one in the PowerShell window:

……… reg delete “HKCU\Software\Microsoft\Windows NT\CurrentVersion\TileDataModel\Migration\TileStore” /va /f

……… get-appxpackage -packageType bundle |% {add-appxpackage -register -disabledevelopmentmode ($_.installlocation + "\appxmetadata\appxbundlemanifest.xml")}

……… $bundlefamilies = (get-appxpackage -packagetype Bundle).packagefamilyname

……… get-appxpackage -packagetype main |? {-not ($bundlefamilies -contains $_.packagefamilyname)} |% {add-appxpackage -register -disabledevelopmentmode ($_.installlocation + "\appxmanifest.xml")}

RESET ALL STORE APPS / REREGISTER / APPS MISSING FROM WIN START MENU
Re-register all store apps, so they appear again in start menu. For that, open a PowerShell window as Administrator. Copy and paste the following line into the PowerShell window and press Enter:

Get-AppxPackage -AllUsers| Foreach {Add-AppxPackage -DisableDevelopmentMode -Register “$($_.InstallLocation)\AppXManifest.xml” -Verbose }

Note: if you re-register all applications, all your apps are back, however all your pinned apps will be reset (the right panel will be empty) so you need to re-pin everything that you want. Personnaly I did a screen capture before, to remember what I pinned and where (use the “snipping tool” in startmenu/windows accessories, with a delay to be able to open the start menu before the capture)