There are lots of reasons that could cause that.
1. If it has worked before and just started locking up.
Will it work with other computers?
If it does then the problem is with the laptop
Otherwise it's the drive. You may have to
re-formatt and start over.
2. If it is a new HD and has never been used.
Has it been formatted?
Check the setup information that came with the drive,
Answered Jul 16, 2010
Edited Jul 16, 2010