You would be much better off taking this to the tech support forums.
To preempt some of their suggestions, update your drivers (don't use your computer's tools to do this. Go directly to the component manufacturer's websites). Also, try running in safe mode (minimal graphics settings).
If safe mode works, then it's likely you've got the game set too high for your computer.
Where to now?
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And, as always, the first things to check with any "strange computer issues":
1) Take off the side panel of your case.
2) Clean out the insides of any dust bunnies, pet furballs, etc.
3) Make sure all of your fans are actually running.
4) Get/Use a temperature monitoring software and keep an eye on your temps.
6000+ levels gained and 8 level 50's
Hello, my name is Soulwind and I have Alt-Itis.
Overheat is my first guess to.
Seconding Soulwind's suggestions.
Try an extended CoH session with extra cooling, sides off, fan blowing on it, etc. See how that goes.
Dying powersupply may be an issue as well.
www.paragonwiki.com is a great source of information for this game.
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Ok, been trying to fix this by myself for two weeks now but am no closer. Approximately 20-25 minutes after logging in CoH inevitably crashes itself. No error messages, no graphics card reboot messages, no nothing; it simply freezes then stops responding.
System Specs: Windows Vista Ultimate 32bit
Service Pack one
AMD Phenom 9550 x4
3 gigs ram
Asus EAH4890 Graphics card.
Any possible information you could provide would be greatly appreciated.
Ok, things I have tried to no avail include, Updating to Service Pack 2
Updating to most recent drivers
All compatability mode settings