I appear to be having the same problem that I had here. My problem was fixed by a newe installer released soon after.
I updated this Windows XP machine with the 4.6 update and L4 crashes during startup. Since L5 does not run on XP, I would definitely like to get this running again. This computer is not connected to the internet, so that is probably the issue.
7737.Logos4Crash.txt
6445.Logos4Error.log
I did a fresh install of L4 and still had the same problem.