I don't think this is a unique problem for VMWare. I have a file server that has AOFO installed on it. When ever this agent is upgraded, the server connects during backup, runs for a bit, then completely blows it's brains out. This time (upgraded to 10d), I uninstalled AOFO from the files server, cleaned the registry, rebooted, installed, rebooted, then configured the AOFO agent and last night, the file server blew it's brains out. Has to be booted, and unfortunately, no event log errors.