I installed wubi in a 30GB partition and I wanted to delete that so that I could install Ubuntu via usb with a larger partition. So I went to the control panel to find Ubuntu but it wasn’t there. I decided to go into the c drive and deleted the Ubuntu file. BUT now every time i boot up it asks me to choose windows 7 and Ubuntu (like I still have dual boot) and if I choose Ubuntu it says "windows could not find this file" and then says the path of the file. what should I do to remove this old wubi/ubuntu?