Same happens to my avatar! I stopped SL for a long time and now I get disconnected everytime i logg in.
I have all the updates on my computer (windows 10) and updated graphic card and I have deleted old files and viewer. Uploaded firestorm first and I got disconnected. Reinstalled it and same problem. I downloaded Second Life viewer and same happens, my avatar gets disconnected.
My settings inworld are on low, still my avi gets disconnected. I tried to tp also and same happens when I change locations.