Hello, I had a similar problem but I fixed it, you may have a program on your computer that is causing it to crash for example I had a program called Questscan and I had no idea were it came from, but as soon as I uninstalled it it loaded just fine. I say go to your control panel (which can be accessed from your start menu) and go to programs (in the control panel) it should say uninstall a program. From there it will give you a list of programs, look for odd ones you know are not with your computer, but be careful if you uninstall programs that need to be with your computer(ones that came with your computer like adobe flash player). uninstall the program and it should load Second Life.
Hope I helped