[Second Life viewer won't work!]

Umm okay...I have got a PC. Vista operating system. Which video cards are supported?I should check mine i guess. 

I have a cable and it is not a wifi network.

Uh about the last one I have no single idea.. 

 

[Second Life viewer won't work!]

Please,I could use some help,guys!
I am new here,so, if my question seems stupid I am really sorry.. But I would like to find out whats wrong..

[Second Life viewer won't work!]

I tried opening the viewer to start playing for the very first time but it wont open. There is a window opening every time I try but it is blank . I tried restarting my computer but it wont work either. I have no idea what should I do to fix that. i even uninstalled it and installed it again but nothing would change... Could someone please help me?