System Information
Operating system and graphics card
Windows 7 Home Premium 64bit , ATI Radeon HD 4450
Blender Version
Blender 2.75a , Hash: c27589e , Date:2015-07-07 14:56
Short description of error
Whatever I do in Blender(even just simple start and do nothing) when go to File-User Preferences and click System tab - Blender is dropdown without any messages. Exactly the same when I try to choose Cycles renderer in dropdown list in Infobar.
