Many thanks to Rob Hallock whose article helped me into fixing a recurrent BSOD issue on a newly assembled PC.
I ran Memtest86 : OK,
I ran HighjackThis : 8 suspect register entries and 2 suspect extras, which were fixed.

The 2 following sites helped in indetifying those entries:
http://www.merijn.nu/htlogtutorial.php
http://www.sysinfo.org/bholist.php

I stopped at that step of the curing process, as the issue proved to be solved.
The problem encountered was a reboot when attempting to login as admin or regular user on an AMD PC running XP Pro SP3.

Great article.