J Ravi sir, I would go on to the extent of saying that its a complete waste of money to go for a branded desktop for home use if you have basic ABC knowledge of computer configuration. The reason why some assembled PCs give more trouble is because many people compromise on 3 most basic things: Power supply, Motherboard and Cabinet. I got a PC assembled in Dec 2007 and the installer gave me lifetime free diagnostic facility. If there is some trouble in PC, one can take the cabinet to that installer and he will diagnose the faulty part and if that part needs replacement under warranty, it could be replaced from any authorized service center. All PC components come with 3 year warranty except a few that come with 5 years warranty. e.g. RAM and Hard Disc. For 36k in Dec 2007, I built a PC that could run CRYSIS on high settings in those days.