so since upgrading to snow leopard then to lion now, my computer is virtually useless. completely lags. takes maybe 30 seconds to click. wheel all the time. took it into the store & they said my hard drive is failing. but nothing too major that would be causing this. and i need more ram. i currently have 2gb. so i cant really do anything on this. how long until a hard drive fails. does apple cover failing hard drives out of warranty? i forgot to ask. i realize i have to upgrade ram and hard drive at this point but are there any other options. really cant afford 300$ for a 250 ssd hard drive and another 100$ for 4gb of ram.