Photoshop CS5 x64 crashing while editing layer styles

Question

Hey there,
I searched and seeked through the whole interweb, but hardly anyone seems to have ever had such a problem, so I am guessing this is the right place to ask and hopefully be helped . Short version is: Photoshop CS5 (x64) is constantly crashing when editing a layer style.
I recently installed my CS5 Design Premium on a new laptop (Fujitsu Lifebook AH351) and am having severe problems with Photoshop CS5. On first run everything was fine, and it kept that way for a while. Now everytime I try to edit a layer style Photoshop crashes immediately. I do not need to alter anything, just open the layer style, press OK and Photoshop is gone. I can workaround by resetting preferences which works until next reboot, no matter if I change ANYTHING on the settings or not. Had tried this on the initial PS release and on the latest update (12.0.4). Once I reset settings again, I can work on layer styles again. Did anyone of you have a similar problem or a hint at what I might look?
The Lifebook has a decent feature which I suspect to somehow be the culprit of this case: it has an onboard graphics unit and a separate GPU (nVidia GForce GT 525M) which can be added in on a program-to-program basis. Photoshop indeed recognizes it and lets me activate OpenGL features as well, so from that point it seems fine. The internal GPU cannot be disabled since you connect your monitors to it.
Some data about my system:
Fujitsu Lifebook AH531
Intel® Core™ i5-2410M
RAM: 8 GB DDR3 1333 MHz
750 GB SATA HDD 5400 U/Min
Windows 7 Home Premium x64 (up to date)
NVIDIA® GeForce® GT 525M with 1GB VRAM
Photoshop CS5 x64
no plugins in use/installed
no settings changed, not even shortcuts
Thanks in advance
enoversum

Answer 1

Funny replying to myself repeatedly. It seems I have found the problem with no solution in sight. My findings are as follows:
I am running two external monitors on my laptop (HDMI and VGA), the laptop screen is off. If I unplug one screen, Photoshop is fine with me. No crashes.
In nVidia settings you can choose what GPU is being used for specific programs. Changing it to the internal one, Photoshop is fine with me. No crashes. Crappy performance.
I came to the idea of it having to do with dual monitors in my long way through help forums, and one thread here (on problems with 4 monitors) suggested to disable the ScriptingSupport.8li via re-naming which didn't work for me nonetheless. Now it seems up to me whether I'd love to farewell either my powerful GPU or my second monitor for working with Photoshop.
Still, does anybody have a notion of what else I could possibly do? I won't assume Fujitsu to offer a fix for this, since it is hard to track down precisely where the problem comes from.
All the best
enoversum
Edit: BTW, Windows settings confirm both screens are handled by/connected to the internal GPU, no matter what Photoshop is using ultimately. That seems like normal behaviour, and I cannot switch since the two ports are on the internal card.