Posted 03 February 2013 - 05:58 PM
Generally not difficult, depending on the way the laptop is constructed. All the laptops I've used have hard drive access by lifting a small hatch on the underside, typically secured with two small screws.
My Toshiba is the simplest - the hard drive just has a flat bracket attached to the end, held down with two screws. After removing the laptop's battery, you undo the screws, lift the bracket enough to clear the case and the drive slides right out.
My HP is more complicated - the drive is in a tray with an adapter from its SATA connector to the mainboard. You remove it the same way, but to change the drives you dismantle the tray/adapter assembly and fit the new drive into it first, then refit.
Also, maybe you can download an explanatory manual from the manufacturers support site, or Google might find a teardown tutorial for your laptop model or similar on youtube.
Top 5 things that never get done: