The main problem was finding a Windows Vista setup disc that fit my needs. It needed to be Home Premium, 64 Bit and German. Luckily, I found this website that provides links to Windows Vista, Windows 7 and Windows 8. After downloading and trying to burn it in my own ways, I created an ISO disk image from the Vista setup files with a programme called WBI Creator 1.2 and burned it with Windows 7’s Image Burner. After putting the CD into the tray and booting the laptop, you will see the Windows Vista setup appear. Just follow through the instructions on the screen.