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Used Tweaking for permissions, it fixed my PC but I cannot open png files+Store

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Bill Gates:
First of all, big thanks to Tweaking. I messed up my permissions and for 2 weeks I've been having all sorts of problems and trying to revert the changes. Nothing worked and I had to bother so many people.

Tweaking solved everything but it just created one problem: Whenever I try to open any .png/.jpeg or any image file, no matter if it's located on C, D or E, it shows me the following error:

Windows cannot access the specified device, path, or file. You may not have the appropriate permissions to access them.

Edit: I noticed that Microsoft Store and all Microsoft apps (like Calculator, Xbox Companion etc) also have stopped working.

Can anyone please tell me how to fix this? It's obviously a permission thing that I have to change somewhere!

Boggin:
The steps in this article may help with that - https://www.minitool.com/backup-tips/windows-cannot-access-the-specified-device.html

Windows Repair auto creates a registry back up when you access the repairs.

You can use Backup Tools to restore from that back up which may resolve your problems.

Can you access things normally in Safe Mode ?

Bill Gates:
I have two Restore Points that I can revert back to, but the problem is it will just bring back my previous registry and permission problems (which is why I used Tweaking in the first place) and they are much more troublesome than the current ones. It seems that the only problems I'm having now are with Windows/Store Apps, so do you know a way to specifically change their permissions?

Thank you for your response!

Edit: I'll check Safe Mode in a few.

Bill Gates:
More apps are not working. Yikes! I might just have to use the restore point but I'm still looking for more solutions first.

Boggin:
Can you open either a Command Prompt (Admin) or Powershell (Admin) and enter these cmds -

dism /online /cleanup-image /restorehealth

sfc /scannow

Not sure if it would be best to use your restore points first though before those cmds to undo any changes Windows Repair may have made.

I find it best to use the restore points in Safe Mode so an antivirus program doesn't get in the way.

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