I recently purchased a one terabyte hard drive (internal) for my vaio laptop that is about 4 years old. Apparently the newer Hard drives are 4k compatible and not 256 so my laptop cannot recognize the partitions. The only solution that I have heard so far is to purchase a new version of Windows 7 since the key that I have for my version of apparently has restrictions on it that need to be lifted. My laptop does recognize the hard drive, but now my key doesnt work. More information can be provided if my description was lackluster.