Different tricks to try
How to Fix 'explorer.exe class not registered' Error in Windows 10 (2021)
You tried to run a program in Windows 10 and instead got the "Class not registered" error from explorer. Don't worry. This is a fairly common error. It is usually caused by a corrupt file associated with "explorer.exe". However, it can also be caused by a failing hard drive, although this is less common.
In this article, we have prepared several solutions to fix the 'explorer class not registered' error.
This is the simplest solution and in our experience, it is also the solution that has the best chance of fixing the error. We are going to use Task Manager to restart Windows Explorer properly.
