Windows 7 only sees empty directories

I have a new computer with Windows 7 installed.
My old computer had Windows Vista installed.

I took the old internal drive from the old computer and have plugged it into the new computer using a Sata->USB adapter.

I've launched a cmd.exe window and an explorer shell both with "Administrator" priviledge.

However, many of the directories are empty.

The few files that do show up, I cannot read:

E:\Program Files\SharpDevelop\3.0>date
The current date is: 14/05/2012
Enter the new date: (dd-mm-yy)
E:\Program Files\SharpDevelop\3.0>dir
 Volume in drive E has no label.
 Volume Serial Number is CCC7-D79E
 Directory of E:\Program Files\SharpDevelop\3.0
30/11/2010  21:27              .
30/11/2010  21:27              ..
30/11/2010  21:27              AddIns
30/11/2010  21:27              bin
30/11/2010  21:27              data
30/11/2010  21:27              doc
28/08/2010  21:25                65 SharpDevelop.url
           1 File(s)             65 bytes
           6 Dir(s)  131,958,325,248 bytes free
E:\Program Files\SharpDevelop\3.0>type SharpDevelop.url
The system cannot find the file specified.
E:\Program Files\SharpDevelop\3.0>dir bin
 Volume in drive E has no label.
 Volume Serial Number is CCC7-D79E
 Directory of E:\Program Files\SharpDevelop\3.0
30/11/2010  21:27              bin
           0 File(s)              0 bytes
           1 Dir(s)  131,958,325,248 bytes free
E:\Program Files\SharpDevelop\3.0>dir bin\bin
The system cannot find the file specified.
E:\Program Files\SharpDevelop\3.0>cd bin
The system cannot find the path specified.
E:\Program Files\SharpDevelop\3.0>

The above is just an example of the many files and directories that I cannot access from the old drive.

What's going on?

Is the drive corrupted? Or is it something to do with Windows 7 reading Vista drives?

If it's corrupted, I can I confirm this?

How can I get access to all of the data?

(P.S. I don't have a Linux or Mac box).