What could cause my computer to shut down after Windows starts?

Question by chzmcgill: What could cause my computer to shut down after Windows starts?
I have Windows XP Home Edition SP2 and about 1 week ago it started shutting down my computer completely just after Windows loads my settings. It does this about 7 out of 10 times I power up. Let me give a few details that may help. Compaq Presario V2710 laptop, WINXPSP2 Home Edition, Mobile AMD Sempron 3300+ Processor 1.99 GHz 348 MB Ram , ATI Mobility Radeon Xpress 200 Graphics with the latest version of ATI Catalyst drivers downloaded. I have AVG 8 security & anti virus plus my windows firewall running at all times. I use IE7 and don’t surf the web. Between my girl and I, we probably have a total of 10 websites we visit regularly. All have security certificates and are well known sites, ie Yahoo, Comcast, ESPN, Cabelas and the likes. My computer is Full Scan daily by both AVG and Windows Defender. Nothing other than a tracking cookie has ever been found. I use a LINKSYS wireless router with WEP 28 bit encryption and the only person that knows any of the passcodes or network keys are myself. Heres EXACTLY what my computer does every time. I power up and Windows loads, I sign in under my screen name, says Windows is loading personal setting, desktop appears and after about 30 seconds of loading and starting the Start-up programs, my screen REFRESHES(it goes black for a split second and comes back up, and everything is running) As soon as I try and open up any personal file, log on to the the internet, my computer starts whinning(processor sounds like it running wide open, the fan kicks on, and the mouse pointer is like 2 seconds behind me when I drag, point, anything, LOOKS LIKE IT’S SLOW MOTION) then all the keyboard lights come on, the computer clicks 1 time, and then powers completely down by its self. I don’t mean it reboots, it completely shuts off and doesn’t come back on. I can hit the power button immediately, and go through the same process all over and its same everytime. Anyone have any ideas. I own the WINXPSP2 Operating System and Application and Driver Recovery CD’s but I just don’t think I need to go that far just yet. Am I simply overlooking a simple setting. I’ve checked everything, from the battery(shows 100% and besides my computer stays plugged in to the outlet), rebooting to last known good config, rebooting in safe mode, ran diagnostics at HP, ran hard drive test, graphics tests, sound tests, and ran System Restore 6 times starting with Dec 1 and going further back(all the way to OCT. 1) each time using a system restore point. My brain hurts, someone please help
Since the fan was brought to my attention, it’s spinning fine as well as spinning the ENTIRE time my computer actually stays on. I did notice though that on the back of the laptop where the power cord connects which is directly next to the battery of course, my computer is “grated” like the area over the cooling fan which is a secondary cooling vent for the fan exhaust. So my computer “vents” properly weither it’s in my lap, on a desk or sitting in the floor. HOWEVER— There is a tremendous amount of heat coming out of this “grated area”. What would cause my fan to run the entire time I’m powered up? Never had problem before this power shutoff started occuring. When I check Task Manager, or look at computer performance graphs internally they both show my “Usage” at 100%. Could this cooling prob cause my processor not to keep up with running programs or do I just have too many running(40 processes running on average at once) I’ve had as many as 135 running and never had prob. ???
Since the fan was brought to my attention, it’s spinning fine as well as spinning the ENTIRE time my computer actually stays on. I did notice though that on the back of the laptop where the power cord connects which is directly next to the battery of course, my computer is “grated” like the area over the cooling fan which is a secondary cooling vent for the fan exhaust. So my computer “vents” properly weither it’s in my lap, on a desk or sitting in the floor. HOWEVER— There is a tremendous amount of heat coming out of this “grated area”. What would cause my fan to run the entire time I’m powered up? Never had problem before this power shutoff started occuring. When I check Task Manager, or look at computer performance graphs internally they both show my “Usage” at 100%. Could this cooling prob cause my processor not to keep up with running programs or do I just have too many running(40 processes running on average at once) I’ve had as many as 135 running and never had prob. ???

Best answer:

Answer by ZuvY
srry Idk.
Will someone please help me!?
http://answers.yahoo.com/question/index;_ylt=AgXTq6m47zzTh_CYnQ2hC.Psy6IX;_ylv=3?qid=20081207114708AASM7E0

Add your own answer in the comments!