How'd ya do!?

This issue I'm having has gotten completely lost to me, so my last will was to make an account here and post this thread to seek help and any solutions.
When I play City of Heroes it can be at any given time, but mainly when on iTrials; my screen Freezes and the only thing I'm left to do is Ctrl-Alt-Del, look at a message saying City of Heroes has stopped working... and then cancel and close program.

This never used to happen to me.
My Spec's:
Operating System - Windows 7 Home Premium (32-bit)
Graphics Card/ Display Adapter - ATI Radeon HD 4600 Series
-AMD Phenom (tm) 8750B Triple Core Processor 2.40GHz
-3.25GB RAM!
- Hard Drive is 290GB free -233GB
Now... I have my graphics on 1024x768, Screen refresh rate 60, quality is on Performance, the FSAA or whatever it is is as low as it goes I believe. NOW all the settings I have on is lower then what I used to run it on on my ****** computer so I strongly believe turning my graphics down isn't really acceptable to me

and won't help, but I will try it lower and see if I still Freeze if it's recommended to me, but I doubt it's the issue :P
And before ya say it

... I have updated ALL drivers, I have Virus scanned and found no threats, I have done a disk cleanup, and I have done disk de-fragmentation. What I have also done in-game is commands like /sync & /unloadgfx ,
and I am still getting screen Freezes.!
The only other thing I can think to mention is I heard a rumour it could be due to the NCSoft Launcher being US or EU, I am from the UK in europe and from what I checked I think I may have the US version of the launcher, but knowing how to check for sure would help if anyone knows + knowing is this rumour has a chance of even being true, and if so how to change Launchers.
So ye guys and gals! Please help me cause it is getting a lil tiresome now having to close and reopen the whole time; And thumbs up for Freedom! hope its good!