I recently received this Windows troubleshooting tip in my e-mail. I would be very surprised if in fact you were not aware of what is below. However, just in case I thought I would send it. It attempts a normal boot but records the status of every step Windows takes during the process. You can use this option to log a failed boot.
Failed steps are often excellent clues to the cause of the problem.
Your trial copy of AutoSpell will be good for 25 days, after which you must register it with CompuBridge. PowerDesk 4 is a free download with no time or usage limits. SlowView is an ImageFileViewer. That's what SlowView is thought to be used for. Also note, that SlowView is Freeware for both private and commercial use.