Unity opens for 5 seconds then closes

Okay so i have been working extremely hard on an android game the past 2 months and i decided to take a two week break, so to my surprise 4 days ago i attempted to open unity and it refused to stay open, unity opens for 3 seconds and then immediately closes with no warning or error.

I have re-installed unity and restarted my computer with no effect.

I would like to know if this is a common issue and if a fix is available if not does anyone have suggestions?

With regards, Tony (btw i tried to keep it as short and understandable as possible)

Same problem here. Any Update on this? I added DEP on windows 8 x64