How to fix “Class not registered” error in Google Chrome?

Google Chrome users can sometimes encounter an error that says “Class not registered.” It can appear on any version of the Windows operating system.

There is some confusion in your Windows Registry and this is what is causing the error. For example, if you try to launch Google Chrome directly using the browser executable, i.e. chrome.exe, then it will start quietly. However, this does not completely solve the problem, and you definitely need to come up with something.

Solution method for “Class not registered”

Fortunately, there is one simple method that can quickly fix the “Class not registered” error situation. To complete it, do the following:

• Press the key combination Win + R to launch the Run window.
• Copy regedit.exe to an empty line and press Enter to launch the Windows Registry Editor.
• Now you will need to back up the registry entries in case you delete the wrong key and create another problem. In the left pane, click on “File – Export”.
• Save the backup file in a directory where you can conveniently access it.
• Once you’re done with the backup, delete the keys below. ATTENTION: remove the subkeys, not the root keys themselves. For example, go through the path HKEY_CLASSES_ROOT / Chrome, and delete exactly the key Chrome… And here, in fact, those keys:
  • HKEY_CLASSES_ROOT Chrome
  • HKLM Software Classes Chrome (all of it)
  • HKCU Software Classes Chrome (all of it)
  • HKLM Software Classes ChromeHTML open command DelegateExecute
  • HKCU Software Classes ChromeHTML open command DelegateExecute
• Once you remove the keys, restart your computer and see if Google Chrome starts normally and the “Class not registered” error disappears. If you still made a mistake with deleting the keys, then do the following:
  • Start Windows Registry Editor again.
  • Click on “File – Import”, and then select the backup file that you created in advance.