I am using Windows 8.1 already tried several times uninstall and install the viewer, but does not work. The place blinks until exit from the air. The SL worked 100% in Windows 7 Ultimate and Home Basic. I think swap the Second Life by World Of Kaneva and others, which works 100% in Windows 8.1, but I don't know if I'm going to get used. Now, the Windows 7 has that Windows 8 and 8.1 does not have to have the SL to work properly?