Yeah, as some have already replied, depends on the extent of the crash. If it's just OS corrupted and the HDD itself is okay, then reinstallation is pretty straightforward. If the HDD itself is not working anymore, then got options to either buy new harddisk and install, or erhm, okay, that's pretty much your option. Recovery of a HDD which is not physically kaput is more troublesome, but I think this is seldom the case. More common is a sector in the harddisk corrupted (scratched by HDD read head coz user happy bounce bounce around carrying the laptop while switched on?) in which case one has a choice of reinstallation or buy new HDD also.