I have been trying to install an Aopen AX34U Pentium 3 motherboard in an older Pentium 2 system. I currently have 2 hard drives: one(primary) with WinXP; the other with Win98. It POSts, but after the WinXP screen with build, system processor, memory etc. information the next screen says Windows failed and there are options for Safe Mode, Safe Mode w/ Networking, Safe Mode w/ Command Prompt, Last Known Config., and Load Windows Normally. I've tried all the options without success and this will repeat this sequence over and over again saying that Windows failed to load... Now if I boot from the secondary hard drive with Win98 it works. Everything works fine if I swap the old motherboard back in. Any ideas...?