Yes.
That happens to me as well.
I also create a New Folder, and then Move or Copy the files into it.
Then I right click on that bad folder and choose from the context menu a program
called Unlocker to Delete the bad folder.
It is a free software and very useful.
Ok, next time I'll have the same issue (hoping not), I will use it because DelinvFile is limited to 3 trials and I have already used it twice, so many thanks for this relevant advice!