The crash dump file is missing... Can't deduce what happened just from the log.
Thanks, but such logs are of no use to me... I'm not an OpenSim server developer, and I don't have access to the grid configuration itself.
The interaction I was referring to was not about a blocking of the viewer by the anti-virus, but about the "infection" of the viewer or of the Windows DLLs it uses by anti-virus hooks (aimed at detecting virus attacks) that would introduce bugs and cause havoc in the threading model. Try disabling your anti-virus altogether, and see if the crashes still happen...
Also, since the crashes happen after TP, please enable the "Teleport" debug tag in "Advanced" -> "Consoles" -> "Debug tags" before TP, so to get more log info.
If disabling the anti-virus is not enough to cure the crashes, you could also try and disable "Advanced" -> "Rendering" -> "Textures" -> "Clear Stale Fetches on TP", and see if it stops the crashes from happening.