I've never heard of such a thing.
When you ask a tech question include information about your computer. If the viewer will at least show the login screen, get the info from the viewer's Help-About... and paste in your post with your question. To add your info to an existing question use OPTIONS->EDIT. It’s in the upper right of the question post.
The probable next step for you is a clean install. See: Second Life Clean Install - This is written for those that use multiple viewers.
