1200Mhz CPU, 20GB Hdd (Windows XP Home)

I've just installed another mobo,(it's a second-hand one, and I'm not sure if it's faulty or not) - Microstar MS-6368 ver:5, booted up and got this message:

We apologize for the inconvenience, but Windows did not start successfully. A recent hardware or software change might have caused this.

If your computer stopped responding, restarted unexpectedly, or was automatically shut down to protect your files and folders, choose Last Known Good Configuration to revert to the most recent settings that worked.

If a previous startup attempt was interrupted due to a power failure or because the Power or Reset button was pressed, or if you aren't sure what caused the problem, choose Start Windows Normally.

Safe Mode
Safe Mode with Networking
Safe Mode with Command Prompt

Last Known Good Configuration (your most recent settings that worked)

Start Windows Normally

Use the up and down arrow keys to move the highlight to your choice.
Seconds until Windows starts: 30

The first time I came across this message, the seconds counted down, I tried Start Windows Normally, and it looked as if windows was booting up for a second or two (the black and white progress indicator bar came up), then a blue screen flashed up really quickly (I think it may have been the scandisk message). Then the computer rebooted to the above message again. This time, the seconds did not count down, it remained on 30. I am able to arrow up and down.

I tried Safe Mode, Safe Mode with Networking, Safe Mode with Command Prompt and Last Known Configuration but windows reboots each time. (After listing scrolls of windows system paths?)

When I connected the reset switch to the mobo, I noticed there was only one pin. It's connected across ways.

Do these results suggest the mobo is fine? What should I try next?

I have tried to boot from my XP Home CD, by changing the boot sequence - but I don't think my CD is a bootable one.