**System Information**
Operating system and graphics card
Window7 pro 64
nvidea Quadro k2000
**Blender Version**
2.73 and 2.72b both fail if try to run .exe (Can't see splash screen)
2.72b runs if double click .blend file.
I was animating and asked blender to do a 15% render. It crashed. (2.73 with some add-ons activated)
Trying to re-launch Blender double click the Blender (windows7 start list) icon it showed a featureless grey screen and then freezes. (No splash screen) (2.73 and 2.72b equally bad)
But if I double click a .blend file then 2.72b launches with old preferences and runs normally.
After using that method for a day I retried launching from the start menu. This time 2.73 launches correctly and then freezes as soon as I try to do anything. 2.72b still goes immediately grey screen freeze.
had been working normally for last month, many many hours.
No file attached as I presume problem is corrupted preferences - I wouldn't know where to look.