Can't find the Macintosh HD (D) Drive while using Windows 8

Hi guys,

So earlier when I had installed Win 7 Ultimate on my iMac, it had a D:\\ drive Macintosh HD but when I installed Windows 8 Pro (Retail) on the same iMac, it does not have any D:\\ drive and hence, I can't access Macintosh HD. Because of this, I can't even complete the BootCamp setup and therefore, can't complete installing the drivers. Any help regarding how to find this D drive on my bootcamped windows 8 pro will be appreciated. Thanks.