As you can imagine, its driving me mad. It came with Windows 7 & Windows 8. So we went for Win7 but couldn't use Truecrpyt because of the GPT. So I thought I'd remove all partitions & convert to MBR using DISKPART and then install Win 7 again after I had changed the BIOS to Legacy BIOS and it would work.. It installs but its still GPT!