I got myself a 3TB drive today and was going to install Windows 7 Home Premium 64-Bit on it. I have an ASRock h61m-hvs motherboard and it, supposedly, supports 3TB drives booting. So I initiated the drive as GPT and started installation from EFI. The installation goes through just fine, but on reboot I get an 0X000025 error. I tried installing twice and all to the same error. attempted to initialize the drive as an MBR partition but that only gives me 2TB and a 745GB partitions. 745 GB partition cannot be used for some reason. Don't know what else I can do. Any suggestions. My main drive is about to die so I have to do something but I don't want to loose nearly a terabyte of space.