[svandamme]

no offence, but it's a 5 year old computer... business use...
replace it.. 400 bucks get's you a decent model with 3 years waranty...
Why bother with it for that kind of money ? It will use less power and make less noise too.

I've been on Dell for the last 8 years, no problems.. one warranty issue, video card, most likely due to bad earth in the previous house electricals... replaced in no time...