Computer restarts almost instantly in some games

NMDanny said:

I have a problem i noticed i have for about 3-4 days
My computer restarts every some minutes when im browsing in Mozilla Firefox(but not in Internet explorer)
And when i try to play in BFBC2 , my computer restarts before i even manage to get into a server
Or , when i try to play Red Faction Armageddon in directx 10/11 mode, it instantly reboots the computer, but not in directx 9 mode

I don't think this is a dust/heat problem, because i checked in GPU-Z and Speedfan the temperatures and they are normal, i cleaned the computer before some weeks and the fans are ok

I tried formating C: and reinstalling windows 7, installed ATI driver, and did a full windows update, and i still have the problem

Is Windows 7 . . .
- x86 (32-bit) or x64 ? 64 bit
- the original installed OS on the system? computer came without an OS, but this is the main/only OS installed now
- an OEM or full retail version? Retail
- OEM = came pre-installed on system
- Full Retail = you purchased it from retailer

- What is the age of system (hardware)? About 3 years i think, i have a second 2gb ram stick i bought some months ago
- What is the age of OS installation (have you re-installed the OS?) 1 day, reinstalled OS today and i still have the problem

CPU is Intel Core2 Duo E8400 @ 3.0 GHz
Graphics card is Radeon HD 4850
I have total 4 gb ram(two sticks of 2gb ram)
Included specs from everest at the zip file
I have a Dell U2211H screen that i bought some months ago
And a Gigabyte S-Series motherboard




I found another problem: My screen sometimes get flashing colored dots, then it turns off and on

No DMP's included in upload try this method.




To enable us to assist you with your computer's BSOD symptoms, upload the contents of your "\Windows\Minidump" folder.

The procedure:

* Copy the contents of \Windows\Minidump to another (temporary) location somewhere on your machine.
* Zip up the copy.
* Attach the ZIP archive to your post using the "paperclip" (file attachments) button.



To ensure minidumps are enabled:

Go to Start, in the Search Box type: sysdm.cpl, press Enter.
Under the Advanced tab, click on the Startup and Recovery Settings... button.
Ensure that Automatically restart is unchecked.
Under the Write Debugging Information header select Small memory dump (256 kB) in the dropdown box (the 256kb varies).
Ensure that the Small Dump Directory is listed as %systemroot%\Minidump.
OK your way out.
Reboot if changes have been made.

I enabled minidumps, restarted the computer, then tried to play BFBC2 and it again randomly restarted my computer and it did not generate minidumps
Then i tried to play Red Faction Armageddon on directx 10/11 mode and it worked, then played BFBC2 and it worked too
I will try to play some more to see if there is still the problem

I tried but now it didn't work, again the compute restarted when i tried to play those games
And it still didn't make minidumps, maybe it's not a bsod but something else?

I have this problem again, it was somewhat solved for some days(BC2 worked) but i have it again
I found a minidump from 22/06/2011 and attached it to the post

And now i had two restarts when playing runescape (which is a java browser game), but it didnt generate minidumps

Also according to event viewer:

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

I also had my screen flickering and having flashing dots when seeing movies today