Photoshop CS4 crashes after starting up

Question

Hi all,
Before I buy Photoshop CS4 Extended, I wanted to install the trial first.
The install was succesfully finished, so i started PS.
When i choose for making a new file, i see the screen where you can select the size of the picture.
When i click OK, Windows says: Photoshop CS4 has stopped working.
Now I only can close the program or debug. Debugging doesn't help.
Running in XP mode of disable visual themes doesn't help also..
I'm running dual boot (Vista Ultimate and Windows 7 Ultimate), and on windows 7 it all works great.
Does anyone have a solution for this weird problem?
My computer specs are:
Windows Vista Ultimate SP1 32-bit (fully updated)
Asus P5Q3 Motherboard with 4GB DDR3 RAM
Asus ATI HD 4870 1G Dark Knight graphics card (with the latest driver update - may 15 2009)
Intel Core 2 Quad Q9550 (2,8 Ghz)
Other adobe programs just runs fine, but PS keeps crashing..
Im sorry for my bad English..
I hope someone can help me with this, i really like to purchase PS and work with it..
Regards,
Tim
edit:
by the way, photoshop cs2 and cs3 worked fine..

Answer 1

Hi,
Thanks for the fast relpies. I like to hear my English is OK. I've got to make my English school exams next week!
I checked the permissions of the Photoshop folders in my user directory (if you mean the 'read only' and 'hide' things..?)
All directories were 'read only', but when I uncheck this, it comes back after I click on the properties of the directory again.
Anyway, my account has administrator rights and my UAC is off. (the 'do you really want to' blahblah.. and the virtual directories)
So I don't think the problem is based on permissions.. It also isn't my virusscanner, because when I turn it off (I have Kaspersky Internet Security 2009) the problem still isn't solved.
Maybe useful: I didn't add any plug-ins for PS. I only installed it.
Yes, it will also crash if i input a arbitrary resolution.
Even if i want to load a picture.. jpg or psd, it keeps crashing.
When I select a picture and click OK, it will load.. but before i can even move my mouse.. it crashes.
So, when I see the 'crash screen' of Windows Vista, i can see the picture at the back.
I also checked the event viewer, and there i can see the application error i also got in PS.
I can't find anything about the licensing service. What is the name of this service? Then I can check if it's on in the task manager.
I updated PS as well. But still, no results. I attached the error message and translated someting in English. (my Windows is Dutch).
I really hope you can help me with this!
Regards,
Tim
Edit: I think I forgot the most important!! When I start PS, there comes a warning, before the 30 day trial screen.
It says I've got to download the newest drivers for my graphics card.. but I allready did that. It also says it will turn off the GPU settings in PS.
When I turn this back on, PS gives an error after the loading screen. So then i can't see the interface then. When I restart it, PS automaticly turned off the GPU settings, and it is back to the old problem. I also attached another picture in this post, and tried to translate it. But when you see this screen, maybe you will recognize it.