i have read your problem regarding OpenGL 2.0 renderer not supported error and i would like to tell that check whether you are experiencing this problem with Angry birds game only or you are getting same problem with other games in your computer as well? there can be different reasons behind this problem such as graphic card driver is out of date, Hardware acceleration is set to maximum level. This problem can also occurs if your graphic drivers does not support OpenGL 2.0. First thing you have to check is video Hardware acceleration. if video Hardware acceleration is set to high then you should set it to low and then you have to check whether same problem is occurring or not.