Hi, Can anyone help me with the following weird problem : Sometimes -usually after being turned on for a longer period- my computer just freezes. The only way out ,then is to push the power button. But it gets even more weird : As I try to restart the system, the pc freezes again, but at different points in the startup-procedures. When the PC works long enough to go into the bios, it freezes in bios (which I thing rules out software problems). The longer I wait, the further the startup-procedure goes. So sometimes, it freezes duren the windowsXP boot. After turning of the PC for at least 4 hours (without trying to power up) all the problems seem to have dissapeared. My system : PB Music dream Machine II AMD AThlon 1.1Ghz motherboard: explorer Video : ATI Radeon CDROM Drive (Goldstar) DVD-R (Pioneer) Installed 2nd Harddrive 120GB Installed Firewire-card, Installed 2nd memory-bar 256 I have received the following input on the problem via different sources : - Heat (fans) - Cpu problem - Power supply As a solution, I tried the following things : - disconnect the newly installed HD - disconnecteted the CDROM drive - Dusted off the system (fans) - removed one of the two memory-bars These action did not cause the PC to power up normally. I brought my pc to the shop (twice), but since they do not work on the problem immediately (although I insisted), they don't detect the problem. Does anyone have experience with this problem, or can anyone help me please. Oh yes, when the PC fails to fully power up, i cannot open de CDROM. Don't know if this is important, but I can open the DVD drive from the moment that there is power. Many THx in advance for your response.