If I have a Hard drive in a desktop, is it interchangeable with one in a laptop? The reason I ask is because the hard drive on my laptop recently went kaputz, and I need to purchase a new internal hard drive, but I'm not sure if there is a difference between one for a desktop and laptops, and if I should look for anything special.

I'm sure the laptop hard drive is smaller (in physical size) compared to the desktop one

Smaller as well as a different connection. There are adapters as seen here:

http://techrepublic.com.com/5100-1035_11-5160538.html#

Alright, thanks