Hi,
sorry, I cannot help , but I have a similar issue...
In my case, a samba update destroys the sambe / LDAP confic and the system is not usable anymore.
This "only" happens on my mail server; the VM running for AD, DHCP and DNS has no issues with the update.
If you have a VM, I would suggest that you try to install package for package (remember to take snapshots) and try to update as much as you can...
It is a good idea to have a (ssh / local) terminal open to watch for errors (tail -f /var/log/ syslog)
Regards
Thomas