Just make sure you get a 2.5" drive as opposed to the standard 3.5" and it will fit. Depending on how old the laptop is, they sometimes had a BIOS limitation to how big a HD they could see and partition, but that's only for really old laptops (one's with an original pentium or so). Your's should work with any HD.
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Andy - Reinstated
Hybrid Forum Moderator
'06 Subaru Legacy Spec B - Stock, for now
'98 Civic EX - CTR headlights and grill, Kosei K1's, for sale
'90 240SX - SR20DET that will never get installed, project car.