1. Do you have any PCI cards installed, ex. network card, sound card, modem, etc.?
2. Do you have either SP1 or SP2 installed, and if so...was the SP an upgrade, or installed fresh after the OS? Or, was it a slipstreamed install?
3. Is the installed BIOS the latest version available from Epox?
4. How are your HDD's connected?...onboard SATA controller, PCI SATA controller, IDE controller, etc.
5. If the HDD(s) are connected to the onboard SATA controller, are you running the latest non-RAID SATA controller drivers...available from Epox or the controller manufacturer?
6. Are you using the onboard sound or LAN?...if available.
7. Are you running overclocked...and if so, does it pass Prime?
8. What are your memory timings...and does it pass Memtest86+?
9. When did the problem start?
...and anything else you can think of that might help in troubleshooting your startup problem.