Is there any reason why you want the System Partition at 499MB? Windows 8 will automatically partition the disk. If this is a UEFI computer then the disk needs to be initialized as GPT in diskpart then Windows will automatically create the EFI System Partition of 100MB if the drive is not native 4k advanced format in which case it will be 260MB, the hidden MSR partition of 128MB, and the Windows partition.
The disk's been initialised as GPT; all the necessary UEFI settings in the BIOS are as they should be in this particular installation scenario. I'd just like to recreate the structure of my hard disk as it was received from the manufacturer, hehe. Sounds a bit weird, but the computer served me brilliantly until a few days ago when Windows Update sent my computer haywire... cut a long story short, I had to do a clean windows install (thankfully all my non O.S. files, folders, etc., are on a separate 'storage' hard disk, so nothing was lost in the strictest sense of the word; just a lot of wasted time and a few heart-in-mouth moments).
Currently, I'm on a test install where I'm tentatively trying some stuff out to see whether I can get everything back up and running as I had it previously, and all seems well. I'd just like to do a "proper" install now that I'm sure I've got the process down. That is aside from the partitioning and Diskpart aspect of things, which is proving to be a tad tricky.
Edited by smithee16, 30 October 2016 - 06:59 PM.