After you open the Hard drive From the auto play menu, can you access it as normal?
After this you Still cannot find it in my computer?
Ok , after you plug in the hard drive and the auto Run come up ignore it, or close it.
Then open Control Panel, go to administrative Tools, open computer management
Find the Disk Manager on the list at the Left.
There should now be a List of hard Drives , and CD-Rom's on the Right
Find your USB drive in the List, right click on it, and click Change Drive letter and paths.
Then Give it a Drive Letter , and click OK.
you should now be able to see it in my Computer