If you need to know which version of NTFS you are using you can do that with the fsutil.exe and the following command.
In my case I am testing my C:\ drive:
fsutil fsinfo ntfsinfo c:
More on NTFS Versions on wikipedia.

Cloud and Datacenter Blog focusing on Microsoft Azure
If you need to know which version of NTFS you are using you can do that with the fsutil.exe and the following command.
In my case I am testing my C:\ drive:
fsutil fsinfo ntfsinfo c:
More on NTFS Versions on wikipedia.
Is it possible to update the NTFS version. I am on Vista 64 bit and trying to upgrade to Windows 7 64 bit. I ran the upgrade tool and it tells me that there should be no issues. But when I try running the upgrade I get a message
Windows cannot be upgraded because the hard disk partition is formatted with an unsupported version of the NTFS file system
fsutil fsinfo ntfsinfo C:
Error: Access is denied.
Why the access is denied?
Hi Grigor
You need to run the command promot as an Administrator :)