Welcome to the community, fardy1!
Can you please give us more details about your system? More specifically the capacity of the drive and the motherboard?
Since you need to change the partition table from MBR to GPT, you might want to use another computer running Windows to do so through Disk Management.
If the HDD is above 2 TB in size, you'd need a UEFI-based motherboard in order to successfully install Windows and use the full capacity of the massive hard drive. You should check this article from Tom's Hardware about installing Windows OS on larger HDDs:
http://www.tomshardware.co.uk/faq/id-1923415/install-windows-3tb-4tb-larger-hdd.html
Keep me posted with the details and good luck!
SuperSoph_WD