I have the exact same problem. I click on second life, and a half black/half grey screen comes up. I have let it sit for DAYS and it has done absolutely nothing. I was on Second Life one morning, then logged out and logged back on and it didn't work. I have tried Kirsten's Viewer and Imprudence, I log in and it says there was a problem logging in. On the Second Life Viewer, though, I can't even get to the log in screen. I know that I have all the proper system requirements, but no luck. Does anyone have any suggestions to get it working?