Please read and offer advice. I'm using AMD Tbird 900MHz, KT7-Raid, 300W power supply, Generic Geforce 2MX, 256MB Micron RAM, Aureal Vortex PCI sound card, Kingston kne110tx NIC, Creative 8x4x32 CD/RW, DVD-ROM, WD 30GB ATA100 HD, Windows 98 1st ed. Recently, the system began locking up when running IE6, then wouldn't even boot. Repartitioned and formatted the HD to 1.5GB and 28.5GB drives. Reinstalled Windows with only video card, then installed one card at a time. By the time I got the last card installed, the desktop background would pull up, but before the taskbar and icons come up, I got an error message. Details say Explorer (not IE) caused a page fault. I started over from scratch again,and got the same message. I have checked the RAM with Simtester, and also run "Heavy Load". They ran fine. I swapped out the IDE cables for new ones, and also pulled the HD off the RAID channel. This time (3rd install), Windows will come up with the desktop, icons, and annoying sounds. But, when I try to do anything as simple as explore a CD, or open anything, I get BSOD errors, including one that reported 2 vxd errors on the same error message (one was MSCTP). I thought it might have been IRQ conflicts at first, so disabled the serial ports (no dial up modem - I love my DSL). That didn't help. Do you have any suggestions as to where my problems might lay? I'm leaning to either the MB or CPU, but don't want to dive into buying one and it be the other.