Troubleshoot:Computer keeeps shutting off with error: The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly. Error

Computer keeeps shutting off with error: The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.

Hello,
I do not know what to do anymore.
I have a dell studio 1555 laptop and it keeps shutting off and I get the error: The system has rebooted without cleanly shutting down first.
This error could be caused if the system stopped responding, crashed, or lost power
unexpectedly.
with all bugchecks =0 and no other information the in the event viewer.
This occurs at the most random times (sometimes the computer will run for a couple days, or sometimes it will run for only a few minutes), but as well when I start a game
the laptop shutsdown right when the game starts consistently.
I have tried to create a memorydump, but the memory.dmp file does not showup (as well I tried the small memory dumps but there are no files after a crash).
I ran dell diagnostics on every piece
of harddware and they all came up good.
So I resintalled windows 7 freshly, but the problem still occurs.
I am using games as my benchmark because the games will always cause a definite crash (although the computer also crashes when the the computer has nothing
open and is doing nothing).
This is what I have tried:
I have monitored the tempature and nothing goes over 50 degrees so I do not think this is a problem.
I tried playing games with no drivers and it crashed, and again I tried installing the lastest ati drivers and it still crashed.
I ran memtest+ overnight with
no errors.
I ran a cpu and gpu stress test with no crash.
I have done a chkdsk on my harddrive with no errors.
I ran SFC /SCANNOW with no problems.
I have updated my bios with the latest version and still it crashes.
I have tried a cleanboot and it still crashes.
I have tried running the games only on battery (as well taking the battery out and only running on ac adapter) but it still crashes.
I have no idea what else to try because the event log only show error 41 with nothing else.
Please if anyone can help that
would be great.


PS when running a game I went into taskmanger and create d a dump file while the game was running.
These were the results in the dmp file from it:
WARNING: ddraw overlaps dwmapi
WARNING: dinput8 overlaps ddraw
.WARNING: dsound overlaps dinput8
WARNING: MMDevAPI overlaps hid
WARNING: propsys overlaps MMDevAPI
WARNING: AudioSes overlaps propsys
..WARNING: dnsapi overlaps mdnsNSP

I am not sure if this means anything, but I deleted the .dll files associated with all of them, but then the games would not start, so I restored them and the games start but continue to crash.

Solutions to the Problem Computer keeeps shutting off with error: The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.

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Open Action Center by clicking the Start button Picture of the Start button, clicking Control Panel, and then, under System and Security, clicking Review your computer's status.

Make sure your computer has at least the minimum amount of random access memory (RAM) required to run the program that is displaying the error. Look for the program requirements online or in the packaging information.

Recommended Method to Fix the Problem: Computer keeeps shutting off with error: The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.:

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