Currently I have a pc with Windows 7 installed on it. I have a disk with Windows 8.1 Pro 64 bit which I would like to dual boot with the current Windows 7. After searching on google I found this tutorial: http://www.pcmag.com/article2/0,2817,2425418,00.asp
It told me to remove about 20GB from one of my existing partitions and leaving this as Unallocated for the Windows 8 installer to use. Up to this point, everything worked just fine.
Once I restarted my pc with the dvd in it, it asked me if I wanted to boot from Cd/DVD which I did. It then started the normal Windows setup screen.
In this you had to select Custom. Then I selected the 25GB empty partition I made. Windows then told me it couldn't be installed on this partition with the following error:
"Windows Cannot Be Installed to This Disk. The Selected Disk Has an MBR Partition Table. On EFI Systems, Windows Can Only Be Installed to GPT.
Windows cannot be installed to this hard disk space. The selected disk has the maximum number of partitions of this type."
How will I be able to install Windows 8.1 Pro (64 bit) on my pc whilst keeping the current Windows 7 Ultimate (64 bit)?