When I try to access C:\Users\All Users\Desktop, it gives me "Access is denied", even though I'm using an administrator account.
So what I did was I right click the folder >> Properties >> Security.
I clicked the "Edit" button:

I clicked "Add...":

I typed in DIT-NB0952772\common (which is me). I clicked "OK":

I clicked "OK":

There's an error, and I clicked "Cancel":

The same screen appeared again, same error message. I clicked "Cancel" again:

Which gives me this:

It tells me to "apply the correct change immediately to achieve a consistent state",
But how do I fix this error ?
What's the correct change I should be applying to correct the errors above, and to achieve a consistent state ?