Like it says in the title nothing happens when i try to launch the viewer. It'll flash the small window like its going to startup but then it just goes away and nothing happens. No viewer, no login. Nothing at all. Operating system= Windows Vista, CPU= Intel(R) Core(TM)2 Quad CPU Q9000 @ 2.00GHz, Graphics card= ATI Mobility Radeon HD 3870, Memory= 4GB. Also, i have reinstalled at least 3 times and still no progress.