I'm having the same problem loading games on my Laptop. (error atioglxx.dll) It's a Toshiba Satelite with XP SP 2 Home edition.
My desktop computer has XP Pro SP2, and it doesn't have any problems with loading games in Construct 2. My desktop uses an Nvidia Gforce 9800gt. I made a file with Construct 2 r99 on my desktop (with no problems) and sent it to my Laptop, and on the laptop it will not even open. I've tried updating my ATI drivers, to no avail, thanks to ATI's lack of legacy driver support. Built in GPU is an ATI Radeon xpress 200m. I'd be curious to know if SP3 fixes the problem, or if it's purely an ATI-driver issue.