I have an IBM Aptiva E25 with Win 98SE. Recently I have been having a lot of intermittent problems with the system, mostly locking up. I have reinstalled OS, changed hard drives but the problem still exists. What I am noticing though is that it seems for some reason, my machine’s power would fluctuate (my guess). I have many devices installed on my computer and I have no power cables left (even using a ‘y’ power extension). With this frequent loss of power my system freezes, and I noticed that I sometimes cannot open one of my cd-rom drives. Should I try replacing my power supply or can it be an electrical issue. I have never had this problem when I first got the system.