This one drove me crazy. chkdsk did not work, etc.
This was in a windows xp virtual machine but should work on other versions of windows.
Boot to hirens boot dvd cd_PE_x64 I don't know what version but it has windows 10 on it.
go to the folder that cannot be deleted.
create an empty text document in it. go up one level and try to delete the folder. empty trash.
you must do this one at a time for each folder by itself.
I had 3 folders that would not delete. this worked.
