Office.com/setup - If you attempt to install or launch the program for the Windows 11 or Windows 10 computer, you encounter an warning message MSCOMCTL.OCX or one of its dependencies is not yet registered. Then this article will provide you to find the best solutions to correct the issue that is affecting your device.This solution will require you to run the Troubleshooter Program Install and Uninstall from Microsoft and check whether you can resolve the MSCOMCTL.OCX or one of its dependents aren't registered error that was triggered on your system is fixed. If not, try the following solution.