Well, I have looked into the problems within the Steam Community of Planetary Annihilation and browse through the forums threads in here regarding to the problem. However, despite the solutions I have tried, the game still does not launch and it continue to present the following message: "pa.exe has stopped working" Therefore, I decided to consult with you guys the problem.
Your problem caused by outdated video drivers: Code: Card name: ATI Mobility Radeon HD 5470 Driver Date/Size: 12/17/2009 16:50:55, 4684288 bytes You need to install generic drivers from AMD website: http://support.amd.com/en-us/download/mobile?os=Windows 7 - 64 First try to download and run "AMD Mobility Radeon™ Driver Verification Tool". If it's give you drivers to install just use them. If it's say that your hardware isn't compatible you need do that: Backup important information from laptop. Download and install "Latest Beta Driver" from same page. Usually generic drivers don't cause any problems, but I'm recommend back backups anyway.
Ah.. Seems to be working now after installing beta driver for it. I tried updating the graphics card via the system's device manager before this, apparently does not work. The Beta Driver did the trick, although it cause a system crash after installation. Tthanks for your help.