Hi friends When you brought a WD 4 Tb Hardisk, your windows will support only the 2Tb part of your Hardisk only. Let's Create Western Digital Single Volume 4 TB Drive. First thing you have to do that Install Windows on another hard disk and then connect 4Tb harddisk on secondary Sata Port.
Download Partition Manager: http://trickiknow.com/convert-mbr-to-...
Install Western Digital 4TB Internal Hard Drive in 1 Partition ( Windows 7 )
The main thing of this problem is, all we use normal harddisk which is in default MBR mode which does not Support a Larger drive than 2Tb.
All you have to Convert Your hard drive from MBR to GPT Mode to Support the whole 4Tb drive as 1 Partition.
In this video tutorial, you will find How to Convert your MBR Hardrive to GPT Mode, without Data loss, and How to create 1 partition of 4TB.
Thanks for Watching Subscribe for more and Comment for any Questions!!