**System Information**
Operating system: Windows 7 64
graphics card: ATI Mobility Radeon HD 5870 with latest drivers.
**Blender Version**
Broken: 2.74 Date: 2015-03-31 13:39 Hash: 000dfc0
Worked: (optional)
**Short description of error**
Open Blender
Select File menu
Select User Preferences option
Close User User Preferences window = User Preferences window closes and so does Blender.
I updated my ATI drivers, restarted system opened Blender and re-tested with same result.