Prøvde å gjøre som der stod, men den fant fortsatt ikke harddisken. Men jeg søkte på hjelp i Windows og fant ut dette:
You also need to install the oldest operating system first, which can be frustrating if you want to add an earlier operating system (for example, you're currently running Windows 7, but you want to add Windows Vista or Windows XP).
Warning
Installing an earlier version of Windows after a more recent version is already installed can render your system inoperable. This can happen because earlier versions of Windows don't recognize the startup files used in more recent versions of Windows and can overwrite them. For more information, see Install more than one operating system (multiboot).
Da blir jeg tydeligvis nødt til å formatere hele pc'en igjen da... Trenger ikke å ta back-up av noe denne gangen i det minste
