The best approach I can offer is to start saving for a new system. Being born is deadly, just like smoking if we believe the statements on cigarette packs. Well, that is the major risk of being born, sometime in the future you will die. One of these days your system will die of old-age. It made no sense to replace parts, the costs would have been too high in relation to getting it back up on its feet, so I decided to get a new server. I had a similar outdated server (2004) here that died the other day and the only solution was to get a new one. The system you currently have is very outdated.