Any help on this will be greatly appreciated.

My computer is acting up recently, it will out of nowhere suddenly power down, even when I am not using it! Furthermore, on a few ocassions when it did an auto restart, it starts making beeping sound even before anything appears on the screen. I have to press the restart button to make the beeping sound go away, even worse, on a few ocassion when I press the reset button the entire system wouldn't load. The green light (power light) is still on, but the orange light (Processing light) doesn't blink anymore. I have to shut it down completely by holding on to the Power button, and after several minutes try again, and it will be back up. But the whole cycle will just repeat itself again.

I went to Event Viewer and got this messages when it did a power down itself

-The server {C7E39D60-7A9F-42BF-ABB1-03DC0FA4F493} did not register with DCOM within the required timeout.

-Error code 0000004e, parameter1 00000002, parameter2 0003e7bf, parameter3 0003ffef, parameter4 00000001.

-The following boot-start or system-start driver(s) failed to load:
Imagedrv

I have seen some places saying that power surge due to a failing AGP slot causes the shutdowns. However, I wish I would be able to rectify the problem myself and save me the $$ with help from kind souls out there. Thank you