BSOD Occurring Many Times Daily

I am not confidant that I posess the skills, vocabulary or knowledge needed to participate in this forum however this random shut down problem has become so regular that I require some assistance. Essentially it feels like every time I leave the computer unattended for more than an hour or two I return to find the black screen of death telling me my computer did not shut down properly. Attached is the SF Tools file you reference. - Have figured out how to use Event viewer - 17 Critical Event occurances involving Kernal-power (Event ID41 Task Category63) since 2012_06_02; 1xJune 02, 1xJune 06, 1xJun 18, 1xJun 23, 2xAug 08, 3xAug 10, 1xAug 11, then twice daily since the 12th.