I am having a dickens of a time since yesterday on my wife and kids' computer.
It inexplicably shut down. Upon restart, it started to boot into a loop and then shut down.
It wouldn't go into safe mode but was able to start several times using various options.
Today, while trying to run Spybot S&D, it shut down in the middle.
I thought it was a goner because nothing would work.
Finally, selective start up got me going enough to run hijack this.
The error I get is:
Stop:c000021a{fatal system error}The windows logon process system process terminated unexpectedly with status of0x00000402 (0x00000000 0x00000000) The system has been shut down.
HJT log removed, If one of the techs helping you thinks you may have a malware issue he will instruct you to post a HJT log in the malware forum,
Looking at your log however I see no evidence of malware