I upgraded my Samsung Ultrabook from Windows 8 to 10 last night. Now, it’s virtually useless. The Start button does nothing. Windows Explorer does nothing, and clicking on it gives me an error message, “Explorer.EXE System call failed.” Right-clicking on the desktop does nothing. I cannot open any folders. I can access a few icons on the toolbar, such as volume and messages and the clock/calendar, but that’s about it.
Any ideas?