Why did my machine blue screen?

My machine blue screened this morning and restarted itself.  I went into safe mode and then restarted normally with no problems.

But I was concerned about why my computer blue screened.

Using WinDbg, which is part of the Debugging Tools for Windows package I was able to determine the cause:

ERROR_CODE: (NTSTATUS) 0xc0000218 - {Registry File Failure}  The registry cannot load the hive (file):  %hs  or its log or alternate.  It is corrupt, absent, or not writable.

ADDITIONAL_DEBUG_TEXT:  \SystemRoot\System32\Config\SOFTWARE - hive could not be loaded.

Here are the steps I followed:

1. Installed debugging tools.
2. Looked at my System Properties --> Startup and Recovery Settings --> small dump location
3. From a command prompt:"c:\Program Files\Debugging Tools for Windows (x86)\windbg.exe" -y srv*c:\symbols*http://msdl.microsoft.com/download/symbols -z c:\windows\Minidump\Mini032709-01.dmp
4. from the WinDbg prompt: !analyze -v
5. Read the results.

My Personality Type

My type: ENTJ

Outgoing, logical and decisive, the ENTJ leads by providing conceptual structure and setting goals, rather than by detailing and enforcing procedures, codes and regulations. This “big picture” type rises naturally to conspicuous positions of power and responsibility in all organizational settings (business, military, educational, governmental.) Disorganization, confusion, emotion, inefficiency and illogic drive ENTJs to take charge of situations and institutions. Their intuition fuels their vision and defines their goals. They deal with the world boldly, in an assertive, analytical, objective and organized way which inspires others to salute them and do whatever the ENTJ needs done--including all the detail work! ENTJs certainly do get things done, both at home and at work, but often at substantial cost in terms of wear and tear on the human spirit, for they may neglect the importance of the personal element in accomplishing their purpose. More than any other, this type seems to struggle between an inner drive toward creative spontaneity and the desire for order in the universe.

Final Score: Extrovert: 7 Sensing:5 Thinking:9 Perception:1 Introvert: 2 iNtuition:4 Feeling:0 Judging:8

EDIT: I took a similar test on September 9, 2016 and my type was classified as INTJ

Introverted (I) 55% Extroverted (E) 45% Intuitive (N) 60% Sensing (S) 40% Thinking (T) 62% Feeling (F) 38% Judging (J) 53% Perceiving (P) 47%

INTJ - "Mastermind". Introverted intellectual with a preference for finding certainty. A builder of systems and the applier of theoretical models. 2.1% of total population.