Computer crashes when loading Battle field 3

Originally Posted by Highwayman

Windows 7 doesn't have that issue multi-core CPUs at all... Windows 7 is the most multi-core friendly OS from microsoft and uses all cores effectively without any configuration, maybe you thinking about XP there.

Forcing a fixed value on Advanced Bootup for CPUs doesn't have any effect on windows function, that is complete urban myth, it's merely to enable a feature to use more than one cpu core during booting sequence ONLY, but once in desktop has no further role and using that often causes more problems than it ever solved.

Need proof? simply run task manager in the desktop without that "tweak" and you will see all your CPU cores happily jumping around as you launch or open things without forcing it. You can also get a gadget for the sidebar from Most Wanted Windows Gadgets - Windows Vista and Windows 7 that gives you the same multicore rendering information in a small handy gadget.

Thats not what he was getting at. What you are seeing is many programs running and using processor power. The point he was getting at is that login.exe, explorer.exe, rundll32.dll, dwm.exe, will only use a single core to run, unless otherwise set to. This is all because it is part of the OS, not external software from the OS. Internet Explorer, Calculator, Windows Media Player, these are all external programs. Not something that is deep rooted in the OS. I guess the better way to say it would be user mode as appose to System/kernel mode. System/kernel mode is designed to run on the bare minimum, where user mode is set to use as much of the avalable resources as possable. It works, and makes it work an any system set up. Though it could be made to work even better.

Strange as mine clearly uses all the cores as it see fit for explorer when I check the CPU affinity they are all ticked, and this is also reflected in the taskmanager and system performance monitors.

Explorer is an external application from your OS as well. Things like svchost, scrss, winlogon or dllhost are examples of OS applications that would be affected by the OS not running on all cores. Anything outside of that is run by its own set of rules regarding what cores and how many. All external applications can be changes with out the OS needing to know if you know where the configuration for that application lies.

I also faced such kind of problems while playing games and the main reason for temperature increase in CPU or may be your system got virus infected. Also check that game source of battlefield 3 is proper or not.