
If the BSoD always happens during a normal startup process, then yes, you will be able to trace the problem down one item at a time as suggested by your dad. However, if you are not positive this error occurs every time you boot with a normal startup mode, and does not occur everytime you boot in a selective mode, then you may be chasing after the wind.
I would definitely suggest not installing any hardware or software until figuring out the BSoD issue. Strange this started happening now. The error you gave in your previous post has so many different possibilities its hard to say where to look at the moment.
Please try to troubleshoot which item is causing the startup problem, if that is whats causing it.
I would suggest that you turn on 50% of the items at a time, and see if the problem occurs. Then, you continue to eliminate 50% of what is left until you find the offending entry. Doing it one item at a time is not as efficient.