Yes, I do
When you type Start/Run and enter sfc /scannow, that window appears momentarily. That's just the command window opening and closing to execute the command.
At the same time, a window opens on the Task Bar, orange in color, headed Windows File Protection. If you just click on it, follow instructions, all will be well.
I think this threw me the first time I ran sfc /scannow
And...when you run chkdsk without any additional symbols, all it does is run in read mode. You have to run either chkdsk /r or chkdsk /f to get anything repaired. The chkdsk /r command also includes the chkdsk /f functions.