RESTART YOUR WINDOWS EXPLORER
Restarting Windows Explorer should always be your first course of action if you see the Class not registered problem. The occurrence of the error message may be caused by a brief system malfunction. Restarting Windows Explorer is the best way to fix such a bug.
SET THE PHOTOS APP AS THE DEFAULT IMAGE VIEWER
If the Photos app is not set as the default image viewer, the error notice will probably appear. To make the Photos app your computer’s default application for viewing images. It is better to set it as default since it is the app that Windows 11 comes with.
RESET THE PHOTOS APP
Try restoring the Photos app to its default settings if setting it up as the default image viewer wasn’t helpful. If the issue is being caused by corruption in the Pictures app, doing this will be beneficial.
REPAIR MICROSOFT VISUAL C++ PROGRAMS
An essential part of the Windows operating system is the Microsoft Visual C++ library. It guarantees that all of your computer’s programs function properly.
You are more likely to see problems like Class not being registered when the package becomes corrupt due to an abrupt system shutdown, a malware attack, or any other cause. Fortunately, you may fix the problem using the built-in repair option.
REINSTALL MICROSOFT STORE
One of the many reasons that his error is popping out is that the Microsoft Store may be corrupted. You can try reinstalling it via the CMD to see if that fixes the problems.
It might be really annoying to receive the Class not registered error, especially if you want to see your favorite images on your computer. Fortunately, it’s a typical system problem that is easily fixed. Simply try the suggested fixes to resolve the problem for good.