H HAL9000 New Member Sep 30, 2010 #1 Sep 30, 2010 #1 My computer boot with EFI. My operating system is Windows 7 Ultimate x64 Ultimate. My hard drive is a GPT disk not a MBR disk. I installed EasyBCD 2.0.2 without problem. If I try to modify somethin with EasyBCD the application stop working.