FOSS gamedev and creative worlds

Every time I try to move or delete minetest it comes up with (You Will Need Administrator permmision to move this folder)

I also cant rename it

Go to start menu, Type Explorer in the search box and that should pull up Windows Explorer (it might just say Explorer) right click on it and select Run as Administrator, then browse to your minetest folder and move it. If you don't have Run as Administrator as an option that means you don't have Administrator permissions and you'll need to log in as the Administrator account.

That doesnt work ether
EDIT: It says its open in another program

Make sure it's not running. Restart your computer if you need to, that should ensure it's closed and none of it's files are being used, then try to move it.

What os do you use? If it is windows 7 then i can help. Had a similar problem before.