Microsoft Store or something else causing issues

I think I am having issues with MS Store.
I firstly noticed I can not open any images using Photos, nothing happens when I double click an image.
I have tried to doing > Open with> Photos> Ticking it as default, but the issue remains. However, I can open photos with Photoshop.

I also can not open videos with Default movie player, but I can with BS Player.

Besides this media issue I can not run some things in Control Panel too, and I can not run MS Store, nor Troubleshoot after I find them via Search next to Startup button. I can not open action center in System Tray

What may caused this: Didn't turn off my PC, left it to sleep, came back - Store and Mail icons on taskbar were blank, so I've unpinned them cuz I do not use them often anyway.

What I've tried: Doing a DISM and SFC/scannow - no errors found
Did a virus scan/reg repair/ junk cleanup with 360 Total Security
Did troubleshooting > Fix problems with windows update, which told me there are available updates for this machine and that I should download them install, I pressed Yes, but nothing is downloading it seems.

Hi thank you , when I turned PC on today things went back to normal without me doing anything, not sure how tho cuz rebooting did not work yesterday

Masterchiefxx17 said:

Follow this guide below to reinstall the applications and see if they come back:

Reinstall and Re-register Apps in Windows 10 Windows 10 Tutorials

AFter using browser for a while, specifically Outlook and writing emails, things are back to where they were, and unresponsive again I will try the link you gave me, Thanks

Masterchiefxx17 said:

That is a little odd that it recovered. Regardless, reinstalling the apps should resolve the issue.

Yeah, it recovers every time I turn the PC back on again. My Chrome is terribly slow lately, perhaps its related

Same thing today, I turn PC on, everything's fine, after 5mins I can't open images with using default Photo program.
I have tried the solution you gave me, this is what I get
Thanks again for helping me out

Nope, tried running it as admin as you can see on the screenshot.
Tried both for all and for Photo app only, I get not found msg

Masterchiefxx17 said:

You need to run this as an administrator. Looks like you may have opened it without admin rights.

Try running the command for just the Photo's app:

Code:

Get-AppXPackage | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "C:\Program Files\WindowsApps\Microsoft.Windows.Photos_15.1208.10480.0_x64__8wekyb3d8bbwe\AppxManifest.xml"}

Anyone else have an idea?
Btw my internet seems to intermittently slow down a lot, then go back to normal. Not sure if it's related but I'd love to resolve this issue too.