I purchased this service because I found a discussion here about someone with a problem identical to mine. Once I found it here again there was NO SOLUTION DEFINED.
My computer had a new motherboard (V.P4XFCP/P4XFCZ A02 04-03-2003, Intel Celeron(R) 2.00GHz(100x20.0) - the Celeron was on the old MB) installed and I believe that the present bios (Phoenix - AwardBIOS v6.00PG, 1984-2003) came with it, late last year. I've had various problems all along.
A raid card was installed too, supporting hard drives #3 and #4, and I pulled it out until I solve the current lockup problem.
I purchased 2 1G sticks of RAM, correct for the machine except that the seller said they're double-density and the MB must take single only, because it only sees half the memory when I put them in, so I'm back to the 1 stick of 256M RAM that came with the MB installation.
I have 2 hard drives properly installed and jumpered. One has XP SP2 and the other has XP PRO SP2 that I was running previously. I intend to keep a complete operating system loaded on each of 2 drives so that I can just switch the drive to load in the BIOS when a hard drive goes on me. The drives in there now are 200G (formatted to 133 and 67) and 120(I think). The extras to be installed are around 80 - 100 each. All are NTSF.
My system is completely freezing, mouse and keyboard, at some point from beginning to load windows until whenever (usually before the desktop gets loaded with PRO, the XP SP2 usually makes it a coupla minutes - it's a new install). It happens in all diagnostics modes, but I can generally work for a couple of hours in SAFE mode or SAFE w/NETWORK (which gets me on the net). There is no way to install anything at present, since the windows installer is disabled in the modes that stay alive long enough to try. UPDATE: SAFE modes now freeeze almost as quickly as the others.
The really weird thing is that it happens in BOTH DRIVES, in BOTH OSs, with the EXACT SAME kind of freezeup.