Hi Folks
I had this error on Win XP SP2.
I found that it was an update VM WARE install or if you update the VW WARE client this error occurs.
SOLUTION: uninstall VM WARE goto Control Panal> ADD/REMOVE programs > select VMWARE and uninstall. THEN reboot computer and re-run your Untangle.exe install again leaving the installation to install only the default VM WARE client.
It worked for me twice after testing to make sure.
Let me know how you get on.
Thnaks
BB