The reason you cant delete it is because you dont have ownership or security to clear it as it was created by older user/update software etc
The way to do it is this.
First of all, you need to switch of simple file sharing.
1. Open exploer
2. Click Tools -> Folder Options
3 At the very bottom there is a tick box for simple file sharing (recommended) - make sure this is unchecked
4 Navigate to the folder you wish to delete and right click it
5 Select sharing
6 Share the folder with the default options
7 Make sure the permissions tab and security tab give everyone full access
8 You can now delete the folder
You may however get an error message saying you dont have rights to delete it, and windows will offer you the rights, becasue of step 7 above. Take the rights and delete it. You mst be logged on as an administrator to perfom this.
Works for me every time any queries leave me a reply.
PS make sure you switch simple file sharing back on if you share files over a home network.