movie maker already installed?

i've got a problem with windows essentials.

i wanted to download windows movie maker because i wanted to learn about video editing and it is said it is an awesome programm.

i already downloaded it once a really long time ago for the photo gallery. but also deleted it a couple of months ago.

now i wanted to install it again because of previous reasons.

As i should i started downloadin windows essentials. but when i wanted to choose wich programms to install i couldn't click on movie maker/photo gallery, because they were "already installed"? wich certainly isn't true because i deleted them.

i tried to delete every single bit that had to do something with windows essentials/movie maker/ photo gallery but i'm still getting the same error.

Does anyone recognise the problem and have a solution for it?

Thanks in advance