Unable to Access Macintosh HD from Windows 8.1 Boot Camp

I recently installed a 1TB Seagate SSHD on MacBook Pro and partitioned 80GB to run Windows. I am running Mavericks on my MBP and successfully installed Windows 8.1 using Boot Camp but soon found out that 80GB was WAY too small. Everything had been running very smooth and I was able, at the time, to access files on both sides of the partition while in either operating system (by access I mean that I could open up any file and copy it to the current hard drive I was on and then open it with the respectful program, i.e. While running in Windows, copy a word document saved on my Macintosh HD partition and save the copy to the Windows desktop and then open it with word). I then used WinClone 4 to clone Boot Camp and repartition my Hard Drive to allocate 500GB to each partition. Everything seemed to restore perfectly except that my Macintosh HD does not show up when I go to "This PC" even though the partition is visible under the "Disk Manager" (although it shows up as unnamed and just says Healthy (Primary Partition)). Also, there is an error visible when I go to Administrative Tools>Computer Management>Other Devices>Coprocessor>Properties and under "Device Status" it says "The drivers for this device are not installed. (Code 28) There are no compatible drivers for this device". I read in another forum that someone with a similar problem updated the NVIDIA Driver to fix the problem so I updated to the latest (331.82) driver but this did not solve the problem. How can I get Windows to recognize the Macintosh HD partition and fix this driver error? Are these two related? Any help/advice would be greatly appreciated! Please be gently, I'm still learning a lot as I go. Thank you for your time.