SOny Vaio HDD not detected

Hi,

Recently my Sony Laptop VGN-SZ55GN had a virus attack and i could not copy or delete or change any files on C: drive. In My Computer C: drive displayed " Access is Denied" message. I could not even format the disk. I decided to put a new disk and convert the old into an external storage. When i connect this HDD to an external case it is not detected in any computer. I tried on several PC's but it shows up in device manager with a yellow mark. The hdd is not shown in disk management utility.

Can somone help me how to access this disk as each time i inset it asks for driver and then shows error.